51052257 has 24 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 32126400.

The previous prime is 51052237. The next prime is 51052283. The reversal of 51052257 is 75225015.

It is a happy number.

It is not a de Polignac number, because 51052257 - 2⁷ = 51052129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51052257.

It is not an unprimeable number, because it can be changed into a prime (51052237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9208 + ... + 13670.

It is an arithmetic number, because the mean of its divisors is an integer number (3249792).

Almost surely, 2^51052257 is an apocalyptic number.

It is an amenable number.

51052257 is a deficient number, since it is larger than the sum of its proper divisors (26942751).

51052257 is a wasteful number, since it uses less digits than its factorization.

51052257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541 (or 4538 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 51052257 is about 7145.0862136156. The cubic root of 51052257 is about 370.9695947455.

The spelling of 51052257 in words is "fifty-one million, fifty-two thousand, two hundred fifty-seven".