87811152431 has 2 divisors, whose sum is σ = 87811152432. Its totient is φ = 87811152430.

The previous prime is 87811152413. The next prime is 87811152557. The reversal of 87811152431 is 13425111878.

Together with previous prime (87811152413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87811152431 - 2¹⁸ = 87810890287 is a prime.

It is a super-2 number, since 2×87811152431² (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 (87811155431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43905576215 + 43905576216.

It is an arithmetic number, because the mean of its divisors is an integer number (43905576216).

Almost surely, 2^87811152431 is an apocalyptic number.

87811152431 is a deficient number, since it is larger than the sum of its proper divisors (1).

87811152431 is an equidigital number, since it uses as much as digits as its factorization.

87811152431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 41.

The spelling of 87811152431 in words is "eighty-seven billion, eight hundred eleven million, one hundred fifty-two thousand, four hundred thirty-one".