51919189 has 8 divisors (see below), whose sum is σ = 60716480. Its totient is φ = 43466976.

The previous prime is 51919187. The next prime is 51919201. The reversal of 51919189 is 98191915.

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

It is not a de Polignac number, because 51919189 - 2¹ = 51919187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51919183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85944 + ... + 86545.

It is an arithmetic number, because the mean of its divisors is an integer number (7589560).

Almost surely, 2^51919189 is an apocalyptic number.

It is an amenable number.

51919189 is a deficient number, since it is larger than the sum of its proper divisors (8797291).

51919189 is a wasteful number, since it uses less digits than its factorization.

51919189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172539.

The product of its digits is 29160, while the sum is 43.

The square root of 51919189 is about 7205.4971376027. The cubic root of 51919189 is about 373.0576641797.

The spelling of 51919189 in words is "fifty-one million, nine hundred nineteen thousand, one hundred eighty-nine".