51166889 has 16 divisors (see below), whose sum is σ = 55812240. Its totient is φ = 46725120.

The previous prime is 51166877. The next prime is 51166891. The reversal of 51166889 is 98866115.

It can be written as a sum of positive squares in 8 ways, for example, as 3211264 + 47955625 = 1792^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 51166889 - 2²⁴ = 34389673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51166849) 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, 97949 + ... + 98469.

It is an arithmetic number, because the mean of its divisors is an integer number (3488265).

Almost surely, 2^51166889 is an apocalyptic number.

It is an amenable number.

51166889 is a deficient number, since it is larger than the sum of its proper divisors (4645351).

51166889 is a wasteful number, since it uses less digits than its factorization.

51166889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its digits is 103680, while the sum is 44.

The square root of 51166889 is about 7153.1034523485. The cubic root of 51166889 is about 371.2470437777.

The spelling of 51166889 in words is "fifty-one million, one hundred sixty-six thousand, eight hundred eighty-nine".