2312221131 has 48 divisors (see below), whose sum is σ = 3939037440. Its totient is φ = 1291671360.

The previous prime is 2312221103. The next prime is 2312221159. The reversal of 2312221131 is 1311222132.

2312221131 is a `hidden beast` number, since 2 + 312 + 221 + 131 = 666.

2312221131 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2312221103) and next prime (2312221159).

It is not a de Polignac number, because 2312221131 - 2⁵ = 2312221099 is a prime.

It is a super-2 number, since 2×2312221131² = 10692733117285838322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2312221181) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52986 + ... + 86208.

It is an arithmetic number, because the mean of its divisors is an integer number (82063280).

Almost surely, 2^2312221131 is an apocalyptic number.

2312221131 is a deficient number, since it is larger than the sum of its proper divisors (1626816309).

2312221131 is a wasteful number, since it uses less digits than its factorization.

2312221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33296 (or 33293 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2312221131 is about 48085.5605249642. The cubic root of 2312221131 is about 1322.3399593597.

Adding to 2312221131 its reverse (1311222132), we get a palindrome (3623443263).

It can be divided in two parts, 23122 and 21131, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 2312221131 in words is "two billion, three hundred twelve million, two hundred twenty-one thousand, one hundred thirty-one".