2312518220 has 48 divisors (see below), whose sum is σ = 4924989216. Its totient is φ = 912000000.

The previous prime is 2312518213. The next prime is 2312518223. The reversal of 2312518220 is 228152132.

It is a self number, because there is not a number n which added to its sum of digits gives 2312518220.

It is not an unprimeable number, because it can be changed into a prime (2312518223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504740 + ... + 509300.

It is an arithmetic number, because the mean of its divisors is an integer number (102603942).

Almost surely, 2^2312518220 is an apocalyptic number.

2312518220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2312518220 is an abundant number, since it is smaller than the sum of its proper divisors (2612470996).

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

2312518220 is a wasteful number, since it uses less digits than its factorization.

2312518220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922 (or 4920 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2312518220 is about 48088.6495963445. The cubic root of 2312518220 is about 1322.3965911738.

The spelling of 2312518220 in words is "two billion, three hundred twelve million, five hundred eighteen thousand, two hundred twenty".