51965251 has 12 divisors (see below), whose sum is σ = 56794192. Its totient is φ = 47261088.

The previous prime is 51965237. The next prime is 51965261. The reversal of 51965251 is 15256915.

51965251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51965251 - 2⁵ = 51965219 is a prime.

It is a super-2 number, since 2×51965251² = 5400774622986002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51965201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263685 + ... + 263881.

Almost surely, 2^51965251 is an apocalyptic number.

51965251 is a deficient number, since it is larger than the sum of its proper divisors (4828941).

51965251 is a wasteful number, since it uses less digits than its factorization.

51965251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 313 counting only the distinct ones).

The product of its digits is 13500, while the sum is 34.

The square root of 51965251 is about 7208.6927386316. The cubic root of 51965251 is about 373.1679554690.

The spelling of 51965251 in words is "fifty-one million, nine hundred sixty-five thousand, two hundred fifty-one".