3131120522 has 4 divisors (see below), whose sum is σ = 4696680786. Its totient is φ = 1565560260.

The previous prime is 3131120471. The next prime is 3131120557. The reversal of 3131120522 is 2250211313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2250211313 = 7 ⋅321458759.

It can be written as a sum of positive squares in only one way, i.e., 3130290601 + 829921 = 55949^2 + 911^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3131120494 and 3131120503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782780129 + ... + 782780132.

Almost surely, 2^3131120522 is an apocalyptic number.

3131120522 is a deficient number, since it is larger than the sum of its proper divisors (1565560264).

3131120522 is a wasteful number, since it uses less digits than its factorization.

3131120522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565560263.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 3131120522 is about 55956.4162719522. The cubic root of 3131120522 is about 1462.9627274398.

Adding to 3131120522 its reverse (2250211313), we get a palindrome (5381331835).

The spelling of 3131120522 in words is "three billion, one hundred thirty-one million, one hundred twenty thousand, five hundred twenty-two".