51512437 has 2 divisors, whose sum is σ = 51512438. Its totient is φ = 51512436.

The previous prime is 51512413. The next prime is 51512443. The reversal of 51512437 is 73421515.

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., 33074001 + 18438436 = 5751^2 + 4294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51512437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51512407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756218 + 25756219.

It is an arithmetic number, because the mean of its divisors is an integer number (25756219).

Almost surely, 2^51512437 is an apocalyptic number.

It is an amenable number.

51512437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51512437 is an equidigital number, since it uses as much as digits as its factorization.

51512437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 51512437 is about 7177.2165217443. The cubic root of 51512437 is about 372.0808901252.

The spelling of 51512437 in words is "fifty-one million, five hundred twelve thousand, four hundred thirty-seven".