51768145 has 32 divisors (see below), whose sum is σ = 77293440. Its totient is φ = 32701440.

The previous prime is 51768139. The next prime is 51768191. The reversal of 51768145 is 54186715.

It is not a de Polignac number, because 51768145 - 2¹⁵ = 51735377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10026 + ... + 14284.

It is an arithmetic number, because the mean of its divisors is an integer number (2415420).

Almost surely, 2^51768145 is an apocalyptic number.

51768145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51768145 is a deficient number, since it is larger than the sum of its proper divisors (25525295).

51768145 is a wasteful number, since it uses less digits than its factorization.

51768145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305.

The product of its digits is 33600, while the sum is 37.

The square root of 51768145 is about 7195.0083391196. The cubic root of 51768145 is about 372.6955446737.

The spelling of 51768145 in words is "fifty-one million, seven hundred sixty-eight thousand, one hundred forty-five".