51635249 has 2 divisors, whose sum is σ = 51635250. Its totient is φ = 51635248.

The previous prime is 51635209. The next prime is 51635263. The reversal of 51635249 is 94253615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51380224 + 255025 = 7168^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 51635249 - 2²⁰ = 50586673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51635209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25817624 + 25817625.

It is an arithmetic number, because the mean of its divisors is an integer number (25817625).

Almost surely, 2^51635249 is an apocalyptic number.

It is an amenable number.

51635249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51635249 is an equidigital number, since it uses as much as digits as its factorization.

51635249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 51635249 is about 7185.7671128419. The cubic root of 51635249 is about 372.3763510145.

The spelling of 51635249 in words is "fifty-one million, six hundred thirty-five thousand, two hundred forty-nine".