85865151431 has 2 divisors, whose sum is σ = 85865151432. Its totient is φ = 85865151430.

The previous prime is 85865151389. The next prime is 85865151473. The reversal of 85865151431 is 13415156858.

It is a balanced prime because it is at equal distance from previous prime (85865151389) and next prime (85865151473).

It is a cyclic number.

It is not a de Polignac number, because 85865151431 - 2²⁶ = 85798042567 is a prime.

It is a super-2 number, since 2×85865151431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85865151731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42932575715 + 42932575716.

It is an arithmetic number, because the mean of its divisors is an integer number (42932575716).

Almost surely, 2^85865151431 is an apocalyptic number.

85865151431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85865151431 is an equidigital number, since it uses as much as digits as its factorization.

85865151431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 47.

The spelling of 85865151431 in words is "eighty-five billion, eight hundred sixty-five million, one hundred fifty-one thousand, four hundred thirty-one".