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2187624061 = 7244645389
BaseRepresentation
bin1000001001100100…
…0111111001111101
312122110101211001101
42002121013321331
513440012432221
61001024213101
7105132332500
oct20231077175
95573354041
102187624061
11a22947377
1251076a191
1328b2ba50c
1416a779137
15cc0c4d91
hex82647e7d

2187624061 has 6 divisors (see below), whose sum is σ = 2544787230. Its totient is φ = 1875106296.

The previous prime is 2187624053. The next prime is 2187624067. The reversal of 2187624061 is 1604267812.

It can be written as a sum of positive squares in only one way, i.e., 1426195225 + 761428836 = 37765^2 + 27594^2 .

It is not a de Polignac number, because 2187624061 - 23 = 2187624053 is a prime.

It is a super-2 number, since 2×21876240612 = 9571398064532263442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2187624061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187624067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22322646 + ... + 22322743.

It is an arithmetic number, because the mean of its divisors is an integer number (424131205).

Almost surely, 22187624061 is an apocalyptic number.

It is an amenable number.

2187624061 is a deficient number, since it is larger than the sum of its proper divisors (357163169).

2187624061 is an equidigital number, since it uses as much as digits as its factorization.

2187624061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44645403 (or 44645396 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2187624061 is about 46772.0435837478. The cubic root of 2187624061 is about 1298.1480654183.

The spelling of 2187624061 in words is "two billion, one hundred eighty-seven million, six hundred twenty-four thousand, sixty-one".

Divisors: 1 7 49 44645389 312517723 2187624061