2312165220 has 24 divisors (see below), whose sum is σ = 6474062784. Its totient is φ = 616577376.

The previous prime is 2312165209. The next prime is 2312165237. The reversal of 2312165220 is 225612132.

It is a super-2 number, since 2×2312165220² = 10692216009155296800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19267984 + ... + 19268103.

It is an arithmetic number, because the mean of its divisors is an integer number (269752616).

Almost surely, 2^2312165220 is an apocalyptic number.

2312165220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2312165220 is an abundant number, since it is smaller than the sum of its proper divisors (4161897564).

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

2312165220 is a wasteful number, since it uses less digits than its factorization.

2312165220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38536099 (or 38536097 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2312165220 is about 48084.9791514980. The cubic root of 2312165220 is about 1322.3293009291.

Adding to 2312165220 its reverse (225612132), we get a palindrome (2537777352).

The spelling of 2312165220 in words is "two billion, three hundred twelve million, one hundred sixty-five thousand, two hundred twenty".