51115967 has 6 divisors (see below), whose sum is σ = 59461488. Its totient is φ = 43813644.

The previous prime is 51115943. The next prime is 51115973. The reversal of 51115967 is 76951115.

It is a happy number.

It is not a de Polignac number, because 51115967 - 2⁸ = 51115711 is a prime.

It is a super-2 number, since 2×51115967² = 5225684164690178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 521543 + ... + 521640.

It is an arithmetic number, because the mean of its divisors is an integer number (9910248).

Almost surely, 2^51115967 is an apocalyptic number.

51115967 is a deficient number, since it is larger than the sum of its proper divisors (8345521).

51115967 is a wasteful number, since it uses less digits than its factorization.

51115967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043197 (or 1043190 counting only the distinct ones).

The product of its digits is 9450, while the sum is 35.

The square root of 51115967 is about 7149.5431322568. The cubic root of 51115967 is about 371.1238461579.

The spelling of 51115967 in words is "fifty-one million, one hundred fifteen thousand, nine hundred sixty-seven".