31531125103340 has 24 divisors (see below), whose sum is σ = 66223183476912. Its totient is φ = 12610960372800.

The previous prime is 31531125103301. The next prime is 31531125103369. The reversal of 31531125103340 is 4330152113513.

It is a junction number, because it is equal to n+sod(n) for n = 31531125103297 and 31531125103306.

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, 92930711 + ... + 93269390.

It is an arithmetic number, because the mean of its divisors is an integer number (2759299311538).

Almost surely, 2^{31531125103340} is an apocalyptic number.

It is an amenable number.

31531125103340 is an abundant number, since it is smaller than the sum of its proper divisors (34692058373572).

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

31531125103340 is a wasteful number, since it uses less digits than its factorization.

31531125103340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186208577 (or 186208575 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 31531125103340 its reverse (4330152113513), we get a palindrome (35861277216853).

The spelling of 31531125103340 in words is "thirty-one trillion, five hundred thirty-one billion, one hundred twenty-five million, one hundred three thousand, three hundred forty".