31771903497 has 16 divisors (see below), whose sum is σ = 43070284992. Its totient is φ = 20827609920.

The previous prime is 31771903489. The next prime is 31771903519. The reversal of 31771903497 is 79430917713.

It is not a de Polignac number, because 31771903497 - 2³ = 31771903489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31771903297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609423 + ... + 659499.

It is an arithmetic number, because the mean of its divisors is an integer number (2691892812).

Almost surely, 2^31771903497 is an apocalyptic number.

It is an amenable number.

31771903497 is a deficient number, since it is larger than the sum of its proper divisors (11298381495).

31771903497 is a wasteful number, since it uses less digits than its factorization.

31771903497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53608.

The product of its (nonzero) digits is 1000188, while the sum is 51.

The spelling of 31771903497 in words is "thirty-one billion, seven hundred seventy-one million, nine hundred three thousand, four hundred ninety-seven".