31545145124 has 24 divisors (see below), whose sum is σ = 61527684960. Its totient is φ = 14063469696.

The previous prime is 31545145123. The next prime is 31545145157. The reversal of 31545145124 is 42154154513.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31545145123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12206582 + ... + 12209165.

It is an arithmetic number, because the mean of its divisors is an integer number (2563653540).

Almost surely, 2^31545145124 is an apocalyptic number.

31545145124 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31545145124 is a deficient number, since it is larger than the sum of its proper divisors (29982539836).

31545145124 is a wasteful number, since it uses less digits than its factorization.

31545145124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24415787 (or 24415785 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

Adding to 31545145124 its reverse (42154154513), we get a palindrome (73699299637).

The spelling of 31545145124 in words is "thirty-one billion, five hundred forty-five million, one hundred forty-five thousand, one hundred twenty-four".