31530045697 has 4 divisors (see below), whose sum is σ = 31568172336. Its totient is φ = 31491919060.

The previous prime is 31530045683. The next prime is 31530045713. The reversal of 31530045697 is 79654003513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31530045697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31530045647) 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, 19062079 + ... + 19063732.

It is an arithmetic number, because the mean of its divisors is an integer number (7892043084).

Almost surely, 2^31530045697 is an apocalyptic number.

It is an amenable number.

31530045697 is a deficient number, since it is larger than the sum of its proper divisors (38126639).

31530045697 is an equidigital number, since it uses as much as digits as its factorization.

31530045697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38126638.

The product of its (nonzero) digits is 340200, while the sum is 43.

The spelling of 31530045697 in words is "thirty-one billion, five hundred thirty million, forty-five thousand, six hundred ninety-seven".