51937189 has 4 divisors (see below), whose sum is σ = 51973740. Its totient is φ = 51900640.

The previous prime is 51937181. The next prime is 51937199. The reversal of 51937189 is 98173915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40768225 + 11168964 = 6385^2 + 3342^2 .

It is a cyclic number.

It is not a de Polignac number, because 51937189 - 2³ = 51937181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51937181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16054 + ... + 19015.

It is an arithmetic number, because the mean of its divisors is an integer number (12993435).

Almost surely, 2^51937189 is an apocalyptic number.

It is an amenable number.

51937189 is a deficient number, since it is larger than the sum of its proper divisors (36551).

51937189 is a wasteful number, since it uses less digits than its factorization.

51937189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36550.

The product of its digits is 68040, while the sum is 43.

The square root of 51937189 is about 7206.7460757265. The cubic root of 51937189 is about 373.1007713122.

The spelling of 51937189 in words is "fifty-one million, nine hundred thirty-seven thousand, one hundred eighty-nine".