31123232001 has 24 divisors (see below), whose sum is σ = 47606986440. Its totient is φ = 19525533696.

The previous prime is 31123231991. The next prime is 31123232027. The reversal of 31123232001 is 10023232113.

31123232001 is a `hidden beast` number, since 311 + 2 + 32 + 320 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21956126976 + 9167105025 = 148176^2 + 95745^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31123232001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31123232081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1871941 + ... + 1888493.

It is an arithmetic number, because the mean of its divisors is an integer number (1983624435).

Almost surely, 2^31123232001 is an apocalyptic number.

It is an amenable number.

31123232001 is a deficient number, since it is larger than the sum of its proper divisors (16483754439).

31123232001 is a wasteful number, since it uses less digits than its factorization.

31123232001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28865 (or 28862 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31123232001 its reverse (10023232113), we get a palindrome (41146464114).

The spelling of 31123232001 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty-two thousand, one".