15857008231 has 2 divisors, whose sum is σ = 15857008232. Its totient is φ = 15857008230.

The previous prime is 15857008229. The next prime is 15857008301. The reversal of 15857008231 is 13280075851.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15857008231 - 2¹ = 15857008229 is a prime.

It is a super-2 number, since 2×15857008231² (a number of 21 digits) contains 22 as substring.

Together with 15857008229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15857008331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7928504115 + 7928504116.

It is an arithmetic number, because the mean of its divisors is an integer number (7928504116).

Almost surely, 2^15857008231 is an apocalyptic number.

15857008231 is a deficient number, since it is larger than the sum of its proper divisors (1).

15857008231 is an equidigital number, since it uses as much as digits as its factorization.

15857008231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 15857008231 in words is "fifteen billion, eight hundred fifty-seven million, eight thousand, two hundred thirty-one".