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61025031 = 3213948781
BaseRepresentation
bin1110100011001…
…0101100000111
311020211101121100
43220302230013
5111110300111
610015551143
71340463354
oct350625407
9136741540
1061025031
11314a1011
121852b4b3
13c8486b2
14816762b
155556756
hex3a32b07

61025031 has 12 divisors (see below), whose sum is σ = 88783240. Its totient is φ = 40389840.

The previous prime is 61025021. The next prime is 61025033. The reversal of 61025031 is 13052016.

61025031 is a `hidden beast` number, since 610 + 2 + 50 + 3 + 1 = 666.

61025031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61025031 - 218 = 60762887 is a prime.

It is a super-2 number, since 2×610250312 = 7448108817101922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61024995 and 61025013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61025033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23140 + ... + 25641.

Almost surely, 261025031 is an apocalyptic number.

61025031 is a deficient number, since it is larger than the sum of its proper divisors (27758209).

61025031 is a wasteful number, since it uses less digits than its factorization.

61025031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48926 (or 48923 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 61025031 is about 7811.8519571226. The cubic root of 61025031 is about 393.7035549148.

Adding to 61025031 its reverse (13052016), we get a palindrome (74077047).

The spelling of 61025031 in words is "sixty-one million, twenty-five thousand, thirty-one".

Divisors: 1 3 9 139 417 1251 48781 146343 439029 6780559 20341677 61025031