51492189 has 32 divisors (see below), whose sum is σ = 80819200. Its totient is φ = 29148336.

The previous prime is 51492173. The next prime is 51492257. The reversal of 51492189 is 98129415.

It is not a de Polignac number, because 51492189 - 2⁴ = 51492173 is a prime.

Its product of digits (25920) is a multiple of the sum of its prime divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51492289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167574 + ... + 167880.

It is an arithmetic number, because the mean of its divisors is an integer number (2525600).

Almost surely, 2^51492189 is an apocalyptic number.

It is an amenable number.

51492189 is a deficient number, since it is larger than the sum of its proper divisors (29327011).

51492189 is a wasteful number, since it uses less digits than its factorization.

51492189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 480 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 51492189 is about 7175.8058084093. The cubic root of 51492189 is about 372.0321324423.

It can be divided in two parts, 51492 and 189, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 51492189 in words is "fifty-one million, four hundred ninety-two thousand, one hundred eighty-nine".