87188452431 has 16 divisors (see below), whose sum is σ = 117373634400. Its totient is φ = 57564960768.

The previous prime is 87188452391. The next prime is 87188452433. The reversal of 87188452431 is 13425488178.

It is a happy number.

It is not a de Polignac number, because 87188452431 - 2²³ = 87180063823 is a prime.

It is a super-2 number, since 2×87188452431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87188452433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636415 + ... + 761183.

It is an arithmetic number, because the mean of its divisors is an integer number (7335852150).

Almost surely, 2^87188452431 is an apocalyptic number.

87188452431 is a deficient number, since it is larger than the sum of its proper divisors (30185181969).

87188452431 is a wasteful number, since it uses less digits than its factorization.

87188452431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127018.

The product of its digits is 1720320, while the sum is 51.

The spelling of 87188452431 in words is "eighty-seven billion, one hundred eighty-eight million, four hundred fifty-two thousand, four hundred thirty-one".