51368957 has 4 divisors (see below), whose sum is σ = 51457056. Its totient is φ = 51280860.

The previous prime is 51368939. The next prime is 51368963. The reversal of 51368957 is 75986315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75986315 = 5 ⋅15197263.

It is a cyclic number.

It is not a de Polignac number, because 51368957 - 2²⁰ = 50320381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51368927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43169 + ... + 44342.

It is an arithmetic number, because the mean of its divisors is an integer number (12864264).

Almost surely, 2^51368957 is an apocalyptic number.

It is an amenable number.

51368957 is a deficient number, since it is larger than the sum of its proper divisors (88099).

51368957 is an equidigital number, since it uses as much as digits as its factorization.

51368957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88098.

The product of its digits is 226800, while the sum is 44.

The square root of 51368957 is about 7167.2140333605. The cubic root of 51368957 is about 371.7351107859.

It can be divided in two parts, 51368 and 957, that added together give a palindrome (52325).

The spelling of 51368957 in words is "fifty-one million, three hundred sixty-eight thousand, nine hundred fifty-seven".