51236965 has 8 divisors (see below), whose sum is σ = 66214008. Its totient is φ = 37836480.

The previous prime is 51236953. The next prime is 51236981. The reversal of 51236965 is 56963215.

It is a Cunningham number, because it is equal to 7158²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7584516 + 43652449 = 2754^2 + 6607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51236965 - 2¹³ = 51228773 is a prime.

It is a super-2 number, since 2×51236965² = 5250453164822450, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 394066 + ... + 394195.

It is an arithmetic number, because the mean of its divisors is an integer number (8276751).

Almost surely, 2^51236965 is an apocalyptic number.

It is an amenable number.

51236965 is a deficient number, since it is larger than the sum of its proper divisors (14977043).

51236965 is a wasteful number, since it uses less digits than its factorization.

51236965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788279.

The product of its digits is 48600, while the sum is 37.

The square root of 51236965 is about 7158.0000698519. Note that the first 4 decimals coincide. The cubic root of 51236965 is about 371.4164478644.

It can be divided in two parts, 51 and 236965, that added together give a triangular number (237016 = T₆₈₈).

The spelling of 51236965 in words is "fifty-one million, two hundred thirty-six thousand, nine hundred sixty-five".