31125343507 has 4 divisors (see below), whose sum is σ = 31236110136. Its totient is φ = 31014576880.

The previous prime is 31125343499. The next prime is 31125343541. The reversal of 31125343507 is 70534352113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31125343507 - 2³ = 31125343499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31125343547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55382893 + ... + 55383454.

It is an arithmetic number, because the mean of its divisors is an integer number (7809027534).

Almost surely, 2^31125343507 is an apocalyptic number.

31125343507 is a deficient number, since it is larger than the sum of its proper divisors (110766629).

31125343507 is a wasteful number, since it uses less digits than its factorization.

31125343507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110766628.

The product of its (nonzero) digits is 37800, while the sum is 34.

The spelling of 31125343507 in words is "thirty-one billion, one hundred twenty-five million, three hundred forty-three thousand, five hundred seven".