51031451437 has 2 divisors, whose sum is σ = 51031451438. Its totient is φ = 51031451436.

The previous prime is 51031451357. The next prime is 51031451441. The reversal of 51031451437 is 73415413015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42578671716 + 8452779721 = 206346^2 + 91939^2 .

It is a cyclic number.

It is not a de Polignac number, because 51031451437 - 2¹¹ = 51031449389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51031751437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515725718 + 25515725719.

It is an arithmetic number, because the mean of its divisors is an integer number (25515725719).

Almost surely, 2^51031451437 is an apocalyptic number.

It is an amenable number.

51031451437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031451437 is an equidigital number, since it uses as much as digits as its factorization.

51031451437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 51031451437 in words is "fifty-one billion, thirty-one million, four hundred fifty-one thousand, four hundred thirty-seven".