87213431278 has 4 divisors (see below), whose sum is σ = 130820146920. Its totient is φ = 43606715638.

The previous prime is 87213431243. The next prime is 87213431303.

87213431278 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21803357818 + ... + 21803357821.

It is an arithmetic number, because the mean of its divisors is an integer number (32705036730).

Almost surely, 2^87213431278 is an apocalyptic number.

87213431278 is a deficient number, since it is larger than the sum of its proper divisors (43606715642).

87213431278 is a wasteful number, since it uses less digits than its factorization.

87213431278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43606715641.

The product of its digits is 451584, while the sum is 46.

The spelling of 87213431278 in words is "eighty-seven billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred seventy-eight".