51157533 has 16 divisors (see below), whose sum is σ = 80470016. Its totient is φ = 28289520.

The previous prime is 51157529. The next prime is 51157549. The reversal of 51157533 is 33575115.

It is not a de Polignac number, because 51157533 - 2² = 51157529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51157533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157523) 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, 38641 + ... + 39942.

It is an arithmetic number, because the mean of its divisors is an integer number (5029376).

Almost surely, 2^51157533 is an apocalyptic number.

It is an amenable number.

51157533 is a deficient number, since it is larger than the sum of its proper divisors (29312483).

51157533 is a wasteful number, since it uses less digits than its factorization.

51157533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78624.

The product of its digits is 7875, while the sum is 30.

The square root of 51157533 is about 7152.4494405763. The cubic root of 51157533 is about 371.2244145662.

The spelling of 51157533 in words is "fifty-one million, one hundred fifty-seven thousand, five hundred thirty-three".