231220312032 has 48 divisors (see below), whose sum is σ = 627882751440. Its totient is φ = 74415731712.

The previous prime is 231220311979. The next prime is 231220312069. The reversal of 231220312032 is 230213022132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 41523853 + ... + 41529420.

It is an arithmetic number, because the mean of its divisors is an integer number (13080890655).

Almost surely, 2^231220312032 is an apocalyptic number.

It is an amenable number.

231220312032 is an abundant number, since it is smaller than the sum of its proper divisors (396662439408).

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

231220312032 is a wasteful number, since it uses less digits than its factorization.

231220312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83053315 (or 83053307 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231220312032 its reverse (230213022132), we get a palindrome (461433334164).

The spelling of 231220312032 in words is "two hundred thirty-one billion, two hundred twenty million, three hundred twelve thousand, thirty-two".