3131232220 has 24 divisors (see below), whose sum is σ = 6577200000. Its totient is φ = 1252185792.

The previous prime is 3131232217. The next prime is 3131232253. The reversal of 3131232220 is 222321313.

It is a super-2 number, since 2×3131232220² = 19609230431132256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75906 + ... + 109654.

It is an arithmetic number, because the mean of its divisors is an integer number (274050000).

Almost surely, 2^3131232220 is an apocalyptic number.

It is an amenable number.

3131232220 is an abundant number, since it is smaller than the sum of its proper divisors (3445967780).

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

3131232220 is a wasteful number, since it uses less digits than its factorization.

3131232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38397 (or 38395 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3131232220 is about 55957.4143434094. The cubic root of 3131232220 is about 1462.9801235622.

Adding to 3131232220 its reverse (222321313), we get a palindrome (3353553533).

The spelling of 3131232220 in words is "three billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty".