51966189 has 24 divisors (see below), whose sum is σ = 82173312. Its totient is φ = 31384320.

The previous prime is 51966181. The next prime is 51966203. The reversal of 51966189 is 98166915.

It is not a de Polignac number, because 51966189 - 2³ = 51966181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51966181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34204 + ... + 35690.

It is an arithmetic number, because the mean of its divisors is an integer number (3423888).

Almost surely, 2^51966189 is an apocalyptic number.

It is an amenable number.

51966189 is a deficient number, since it is larger than the sum of its proper divisors (30207123).

51966189 is a wasteful number, since it uses less digits than its factorization.

51966189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857 (or 1854 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 51966189 is about 7208.7577986779. The cubic root of 51966189 is about 373.1702007479.

The spelling of 51966189 in words is "fifty-one million, nine hundred sixty-six thousand, one hundred eighty-nine".