2125531931 has 2 divisors, whose sum is σ = 2125531932. Its totient is φ = 2125531930.

The previous prime is 2125531927. The next prime is 2125531939. The reversal of 2125531931 is 1391355212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2125531931 - 2² = 2125531927 is a prime.

It is a super-2 number, since 2×2125531931² = 9035771979401177522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2125531939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062765965 + 1062765966.

It is an arithmetic number, because the mean of its divisors is an integer number (1062765966).

Almost surely, 2^2125531931 is an apocalyptic number.

2125531931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125531931 is an equidigital number, since it uses as much as digits as its factorization.

2125531931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 32.

The square root of 2125531931 is about 46103.4915272152. The cubic root of 2125531931 is about 1285.7480604490.

The spelling of 2125531931 in words is "two billion, one hundred twenty-five million, five hundred thirty-one thousand, nine hundred thirty-one".