51333965 has 16 divisors (see below), whose sum is σ = 66125808. Its totient is φ = 38117376.

The previous prime is 51333943. The next prime is 51333977. The reversal of 51333965 is 56933315.

It can be written as a sum of positive squares in 8 ways, for example, as 3087049 + 48246916 = 1757^2 + 6946^2 .

It is a cyclic number.

It is not a de Polignac number, because 51333965 - 2⁶ = 51333901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2069 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (4132863).

Almost surely, 2^51333965 is an apocalyptic number.

It is an amenable number.

51333965 is a deficient number, since it is larger than the sum of its proper divisors (14791843).

51333965 is a wasteful number, since it uses less digits than its factorization.

51333965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368.

The product of its digits is 36450, while the sum is 35.

The square root of 51333965 is about 7164.7725016221. The cubic root of 51333965 is about 371.6506842473.

The spelling of 51333965 in words is "fifty-one million, three hundred thirty-three thousand, nine hundred sixty-five".