231240043134 has 64 divisors (see below), whose sum is σ = 541108569600. Its totient is φ = 72996686784.

The previous prime is 231240043051. The next prime is 231240043141. The reversal of 231240043134 is 431340042132.

It is a super-2 number, since 2×231240043134² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 231240043098 and 231240043107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2891839 + ... + 2970725.

It is an arithmetic number, because the mean of its divisors is an integer number (8454821400).

Almost surely, 2^231240043134 is an apocalyptic number.

231240043134 is an abundant number, since it is smaller than the sum of its proper divisors (309868526466).

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

231240043134 is a wasteful number, since it uses less digits than its factorization.

231240043134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81774 (or 81768 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 231240043134 its reverse (431340042132), we get a palindrome (662580085266).

The spelling of 231240043134 in words is "two hundred thirty-one billion, two hundred forty million, forty-three thousand, one hundred thirty-four".