51854189 has 4 divisors (see below), whose sum is σ = 51940224. Its totient is φ = 51768156.

The previous prime is 51854141. The next prime is 51854191. The reversal of 51854189 is 98145815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51854189 - 2⁸ = 51853933 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 (51854389) 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, 42107 + ... + 43320.

It is an arithmetic number, because the mean of its divisors is an integer number (12985056).

Almost surely, 2^51854189 is an apocalyptic number.

It is an amenable number.

51854189 is a deficient number, since it is larger than the sum of its proper divisors (86035).

51854189 is an equidigital number, since it uses as much as digits as its factorization.

51854189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86034.

The product of its digits is 57600, while the sum is 41.

The square root of 51854189 is about 7200.9852798072. The cubic root of 51854189 is about 372.9019165325.

The spelling of 51854189 in words is "fifty-one million, eight hundred fifty-four thousand, one hundred eighty-nine".