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2154006031 = 26310917507
BaseRepresentation
bin1000000001100011…
…1000011000001111
312120010010211210011
42000120320120033
513402411143111
6553423454051
7104243514652
oct20030703017
95503124704
102154006031
11a05975681
12501457327
132843497a8
14166107899
15c9184021
hex8063860f

2154006031 has 8 divisors (see below), whose sum is σ = 2164466304. Its totient is φ = 2143563480.

The previous prime is 2154006011. The next prime is 2154006067. The reversal of 2154006031 is 1306004512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2154006031 - 211 = 2154003983 is a prime.

It is a super-2 number, since 2×21540060312 = 9279483963168745922, 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 = 2154005993 and 2154006011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154006011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283180 + ... + 290686.

It is an arithmetic number, because the mean of its divisors is an integer number (270558288).

Almost surely, 22154006031 is an apocalyptic number.

2154006031 is a deficient number, since it is larger than the sum of its proper divisors (10460273).

2154006031 is a wasteful number, since it uses less digits than its factorization.

2154006031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2154006031 is about 46411.2705169768. The cubic root of 2154006031 is about 1291.4640012205.

The spelling of 2154006031 in words is "two billion, one hundred fifty-four million, six thousand, thirty-one".

Divisors: 1 263 1091 7507 286933 1974341 8190137 2154006031