231287278116 has 24 divisors (see below), whose sum is σ = 540119700064. Its totient is φ = 77031561600.

The previous prime is 231287278097. The next prime is 231287278247. The reversal of 231287278116 is 611872782132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8009710 + ... + 8038533.

Almost surely, 2^231287278116 is an apocalyptic number.

It is an amenable number.

231287278116 is an abundant number, since it is smaller than the sum of its proper divisors (308832421948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231287278116 is a wasteful number, since it uses less digits than its factorization.

231287278116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16049451 (or 16049449 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The spelling of 231287278116 in words is "two hundred thirty-one billion, two hundred eighty-seven million, two hundred seventy-eight thousand, one hundred sixteen".