3131023220 has 48 divisors (see below), whose sum is σ = 7253659728. Its totient is φ = 1127869440.

The previous prime is 3131023201. The next prime is 3131023237. The reversal of 3131023220 is 223201313.

It can be written as a sum of positive squares in 8 ways, for example, as 1858816996 + 1272206224 = 43114^2 + 35668^2 .

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, 136199 + ... + 157518.

It is an arithmetic number, because the mean of its divisors is an integer number (151117911).

Almost surely, 2^3131023220 is an apocalyptic number.

It is an amenable number.

3131023220 is an abundant number, since it is smaller than the sum of its proper divisors (4122636508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131023220 is a wasteful number, since it uses less digits than its factorization.

3131023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293780 (or 293778 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3131023220 is about 55955.5468206683. The cubic root of 3131023220 is about 1462.9475730488.

Adding to 3131023220 its reverse (223201313), we get a palindrome (3354224533).

The spelling of 3131023220 in words is "three billion, one hundred thirty-one million, twenty-three thousand, two hundred twenty".