51603137 has 2 divisors, whose sum is σ = 51603138. Its totient is φ = 51603136.

The previous prime is 51603131. The next prime is 51603157. The reversal of 51603137 is 73130615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45171841 + 6431296 = 6721^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 51603137 - 2²⁰ = 50554561 is a prime.

It is not a weakly prime, because it can be changed into another prime (51603131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25801568 + 25801569.

It is an arithmetic number, because the mean of its divisors is an integer number (25801569).

Almost surely, 2^51603137 is an apocalyptic number.

It is an amenable number.

51603137 is a deficient number, since it is larger than the sum of its proper divisors (1).

51603137 is an equidigital number, since it uses as much as digits as its factorization.

51603137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 51603137 is about 7183.5323483646. The cubic root of 51603137 is about 372.2991412962.

The spelling of 51603137 in words is "fifty-one million, six hundred three thousand, one hundred thirty-seven".