51143265 has 32 divisors (see below), whose sum is σ = 92476800. Its totient is φ = 26809920.

The previous prime is 51143233. The next prime is 51143291. The reversal of 51143265 is 56234115.

It is not a de Polignac number, because 51143265 - 2⁵ = 51143233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

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, 4755 + ... + 11175.

It is an arithmetic number, because the mean of its divisors is an integer number (2889900).

Almost surely, 2^51143265 is an apocalyptic number.

It is an amenable number.

51143265 is a deficient number, since it is larger than the sum of its proper divisors (41333535).

51143265 is a wasteful number, since it uses less digits than its factorization.

51143265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494 (or 6488 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51143265 is about 7151.4519504783. The cubic root of 51143265 is about 371.1898994640.

The spelling of 51143265 in words is "fifty-one million, one hundred forty-three thousand, two hundred sixty-five".