2131131437 has 2 divisors, whose sum is σ = 2131131438. Its totient is φ = 2131131436.

The previous prime is 2131131391. The next prime is 2131131451. The reversal of 2131131437 is 7341311312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1294128676 + 837002761 = 35974^2 + 28931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131131437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131131137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065565718 + 1065565719.

It is an arithmetic number, because the mean of its divisors is an integer number (1065565719).

Almost surely, 2^2131131437 is an apocalyptic number.

It is an amenable number.

2131131437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131131437 is an equidigital number, since it uses as much as digits as its factorization.

2131131437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 2131131437 is about 46164.1791544050. The cubic root of 2131131437 is about 1286.8761296062.

Adding to 2131131437 its reverse (7341311312), we get a palindrome (9472442749).

The spelling of 2131131437 in words is "two billion, one hundred thirty-one million, one hundred thirty-one thousand, four hundred thirty-seven".