231639016 has 16 divisors (see below), whose sum is σ = 496369440. Its totient is φ = 99273840.

The previous prime is 231639011. The next prime is 231639017. The reversal of 231639016 is 610936132.

It is not an unprimeable number, because it can be changed into a prime (231639011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068150 + ... + 2068261.

It is an arithmetic number, because the mean of its divisors is an integer number (31023090).

Almost surely, 2^231639016 is an apocalyptic number.

It is an amenable number.

231639016 is an abundant number, since it is smaller than the sum of its proper divisors (264730424).

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

231639016 is a wasteful number, since it uses less digits than its factorization.

231639016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136424 (or 4136420 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 231639016 is about 15219.6917182971. The cubic root of 231639016 is about 614.1445050989.

The spelling of 231639016 in words is "two hundred thirty-one million, six hundred thirty-nine thousand, sixteen".