51164745 has 16 divisors (see below), whose sum is σ = 82901760. Its totient is φ = 26941824.

The previous prime is 51164731. The next prime is 51164749. The reversal of 51164745 is 54746115.

It is not a de Polignac number, because 51164745 - 2¹² = 51160649 is a prime.

It is a super-2 number, since 2×51164745² = 5235662261830050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51164749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20404 + ... + 22773.

It is an arithmetic number, because the mean of its divisors is an integer number (5181360).

Almost surely, 2^51164745 is an apocalyptic number.

It is an amenable number.

51164745 is a deficient number, since it is larger than the sum of its proper divisors (31737015).

51164745 is a wasteful number, since it uses less digits than its factorization.

51164745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43264.

The product of its digits is 16800, while the sum is 33.

The square root of 51164745 is about 7152.9535857574. The cubic root of 51164745 is about 371.2418583620.

It can be divided in two parts, 511 and 64745, that added together give a palindrome (65256).

The spelling of 51164745 in words is "fifty-one million, one hundred sixty-four thousand, seven hundred forty-five".