2312551921 has 9 divisors (see below), whose sum is σ = 2441635833. Its totient is φ = 2189973060.

The previous prime is 2312551903. The next prime is 2312551931. The reversal of 2312551921 is 1291552132.

The square root of 2312551921 is 48089.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2312551921 - 2⁷ = 2312551793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2312551931) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 912426 + ... + 914956.

Almost surely, 2^2312551921 is an apocalyptic number.

2312551921 is the 48089-th square number.

2312551921 is the 24045-th centered octagonal number.

It is an amenable number.

2312551921 is a deficient number, since it is larger than the sum of its proper divisors (129083912).

2312551921 is an frugal number, since it uses more digits than its factorization.

2312551921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100 (or 2550 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The cubic root of 2312551921 is about 1322.4030150325.

The spelling of 2312551921 in words is "two billion, three hundred twelve million, five hundred fifty-one thousand, nine hundred twenty-one".