3131321125 has 16 divisors (see below), whose sum is σ = 4113570240. Its totient is φ = 2373210000.

The previous prime is 3131321111. The next prime is 3131321159. The reversal of 3131321125 is 5211231313.

It is not a de Polignac number, because 3131321125 - 2²⁹ = 2594450213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3131321096 and 3131321105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656851 + ... + 661600.

It is an arithmetic number, because the mean of its divisors is an integer number (257098140).

Almost surely, 2^3131321125 is an apocalyptic number.

It is an amenable number.

3131321125 is a deficient number, since it is larger than the sum of its proper divisors (982249115).

3131321125 is a wasteful number, since it uses less digits than its factorization.

3131321125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318485 (or 1318475 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 3131321125 is about 55958.2087365205. The cubic root of 3131321125 is about 1462.9939695508.

Adding to 3131321125 its reverse (5211231313), we get a palindrome (8342552438).

The spelling of 3131321125 in words is "three billion, one hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-five".