51157065 has 8 divisors (see below), whose sum is σ = 81851328. Its totient is φ = 27283760.

The previous prime is 51157049. The next prime is 51157087. The reversal of 51157065 is 56075115.

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

It is not a de Polignac number, because 51157065 - 2⁴ = 51157049 is a prime.

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, 1705221 + ... + 1705250.

It is an arithmetic number, because the mean of its divisors is an integer number (10231416).

Almost surely, 2^51157065 is an apocalyptic number.

It is an amenable number.

51157065 is a deficient number, since it is larger than the sum of its proper divisors (30694263).

51157065 is a wasteful number, since it uses less digits than its factorization.

51157065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410479.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 51157065 is about 7152.4167244366. The cubic root of 51157065 is about 371.2232825494.

The spelling of 51157065 in words is "fifty-one million, one hundred fifty-seven thousand, sixty-five".