51635501 has 2 divisors, whose sum is σ = 51635502. Its totient is φ = 51635500.

The previous prime is 51635497. The next prime is 51635537. The reversal of 51635501 is 10553615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 855625 = 7126^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 51635501 - 2² = 51635497 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51635401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25817750 + 25817751.

It is an arithmetic number, because the mean of its divisors is an integer number (25817751).

Almost surely, 2^51635501 is an apocalyptic number.

It is an amenable number.

51635501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51635501 is an equidigital number, since it uses as much as digits as its factorization.

51635501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 51635501 is about 7185.7846474828. The cubic root of 51635501 is about 372.3769567937.

The spelling of 51635501 in words is "fifty-one million, six hundred thirty-five thousand, five hundred one".