3031231220 has 12 divisors (see below), whose sum is σ = 6365585604. Its totient is φ = 1212492480.

The previous prime is 3031231211. The next prime is 3031231261. The reversal of 3031231220 is 221321303.

It can be written as a sum of positive squares in 2 ways, for example, as 558755044 + 2472476176 = 23638^2 + 49724^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75780761 + ... + 75780800.

It is an arithmetic number, because the mean of its divisors is an integer number (530465467).

Almost surely, 2^3031231220 is an apocalyptic number.

It is an amenable number.

3031231220 is an abundant number, since it is smaller than the sum of its proper divisors (3334354384).

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

3031231220 is a wasteful number, since it uses less digits than its factorization.

3031231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151561570 (or 151561568 counting only the distinct ones).

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

The square root of 3031231220 is about 55056.6183124245. The cubic root of 3031231220 is about 1447.2371042348.

Adding to 3031231220 its reverse (221321303), we get a palindrome (3252552523).

The spelling of 3031231220 in words is "three billion, thirty-one million, two hundred thirty-one thousand, two hundred twenty".