31538722953 has 16 divisors (see below), whose sum is σ = 44283686720. Its totient is φ = 19910727936.

The previous prime is 31538722937. The next prime is 31538722967. The reversal of 31538722953 is 35922783513.

It is a happy number.

It is not a de Polignac number, because 31538722953 - 2⁴ = 31538722937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31538722903) 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, 19101 + ... + 251877.

It is an arithmetic number, because the mean of its divisors is an integer number (2767730420).

Almost surely, 2^31538722953 is an apocalyptic number.

It is an amenable number.

31538722953 is a deficient number, since it is larger than the sum of its proper divisors (12744963767).

31538722953 is a wasteful number, since it uses less digits than its factorization.

31538722953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235176.

The product of its digits is 1360800, while the sum is 48.

The spelling of 31538722953 in words is "thirty-one billion, five hundred thirty-eight million, seven hundred twenty-two thousand, nine hundred fifty-three".