231540421044 has 48 divisors (see below), whose sum is σ = 573305725440. Its totient is φ = 72573214560.

The previous prime is 231540421019. The next prime is 231540421097. The reversal of 231540421044 is 440124045132.

It is a super-2 number, since 2×231540421044² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7093162 + ... + 7125729.

It is an arithmetic number, because the mean of its divisors is an integer number (11943869280).

Almost surely, 2^231540421044 is an apocalyptic number.

It is an amenable number.

231540421044 is an abundant number, since it is smaller than the sum of its proper divisors (341765304396).

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

231540421044 is a wasteful number, since it uses less digits than its factorization.

231540421044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14218980 (or 14218978 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 231540421044 its reverse (440124045132), we get a palindrome (671664466176).

The spelling of 231540421044 in words is "two hundred thirty-one billion, five hundred forty million, four hundred twenty-one thousand, forty-four".