51157689 has 8 divisors (see below), whose sum is σ = 74411232. Its totient is φ = 31004640.

The previous prime is 51157669. The next prime is 51157697. The reversal of 51157689 is 98675115.

51157689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51157689 - 2¹¹ = 51155641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51157689.

It is not an unprimeable number, because it can be changed into a prime (51157609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775084 + ... + 775149.

It is an arithmetic number, because the mean of its divisors is an integer number (9301404).

Almost surely, 2^51157689 is an apocalyptic number.

It is an amenable number.

51157689 is a deficient number, since it is larger than the sum of its proper divisors (23253543).

51157689 is a wasteful number, since it uses less digits than its factorization.

51157689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550247.

The product of its digits is 75600, while the sum is 42.

The square root of 51157689 is about 7152.4603459229. The cubic root of 51157689 is about 371.2247919036.

The spelling of 51157689 in words is "fifty-one million, one hundred fifty-seven thousand, six hundred eighty-nine".