51575737 has 2 divisors, whose sum is σ = 51575738. Its totient is φ = 51575736.

The previous prime is 51575701. The next prime is 51575753. The reversal of 51575737 is 73757515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41615401 + 9960336 = 6451^2 + 3156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51575737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51575737.

It is not a weakly prime, because it can be changed into another prime (51575437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25787868 + 25787869.

It is an arithmetic number, because the mean of its divisors is an integer number (25787869).

Almost surely, 2^51575737 is an apocalyptic number.

It is an amenable number.

51575737 is a deficient number, since it is larger than the sum of its proper divisors (1).

51575737 is an equidigital number, since it uses as much as digits as its factorization.

51575737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128625, while the sum is 40.

The square root of 51575737 is about 7181.6249553983. The cubic root of 51575737 is about 372.2332357260.

The spelling of 51575737 in words is "fifty-one million, five hundred seventy-five thousand, seven hundred thirty-seven".