3155213220 has 48 divisors (see below), whose sum is σ = 9050082048. Its totient is φ = 820867840.

The previous prime is 3155213213. The next prime is 3155213239. The reversal of 3155213220 is 223125513.

It is a happy 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, 638844 + ... + 643763.

It is an arithmetic number, because the mean of its divisors is an integer number (188543376).

Almost surely, 2^3155213220 is an apocalyptic number.

3155213220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3155213220 is an abundant number, since it is smaller than the sum of its proper divisors (5894868828).

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

3155213220 is a wasteful number, since it uses less digits than its factorization.

3155213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282660 (or 1282658 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 3155213220 is about 56171.2846568422. The cubic root of 3155213220 is about 1466.7054451409.

Adding to 3155213220 its reverse (223125513), we get a palindrome (3378338733).

The spelling of 3155213220 in words is "three billion, one hundred fifty-five million, two hundred thirteen thousand, two hundred twenty".