51951189 has 4 divisors (see below), whose sum is σ = 69268256. Its totient is φ = 34634124.

The previous prime is 51951173. The next prime is 51951217. The reversal of 51951189 is 98115915.

51951189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 51951189 - 2⁴ = 51951173 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 (51950189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658529 + ... + 8658534.

It is an arithmetic number, because the mean of its divisors is an integer number (17317064).

Almost surely, 2^51951189 is an apocalyptic number.

It is an amenable number.

51951189 is a deficient number, since it is larger than the sum of its proper divisors (17317067).

51951189 is a wasteful number, since it uses less digits than its factorization.

51951189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17317066.

The product of its digits is 16200, while the sum is 39.

The square root of 51951189 is about 7207.7173224260. The cubic root of 51951189 is about 373.1342921967.

The spelling of 51951189 in words is "fifty-one million, nine hundred fifty-one thousand, one hundred eighty-nine".