51634389 has 8 divisors (see below), whose sum is σ = 72895680. Its totient is φ = 32398016.

The previous prime is 51634339. The next prime is 51634391. The reversal of 51634389 is 98343615.

51634389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51634389 - 2⁸ = 51634133 is a prime.

It is a super-2 number, since 2×51634389² = 5332220254806642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51634339) 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 7 ways as a sum of consecutive naturals, for example, 506169 + ... + 506270.

It is an arithmetic number, because the mean of its divisors is an integer number (9111960).

Almost surely, 2^51634389 is an apocalyptic number.

It is an amenable number.

51634389 is a deficient number, since it is larger than the sum of its proper divisors (21261291).

51634389 is a wasteful number, since it uses less digits than its factorization.

51634389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012459.

The product of its digits is 77760, while the sum is 39.

The square root of 51634389 is about 7185.7072720784. The cubic root of 51634389 is about 372.3742836577.

The spelling of 51634389 in words is "fifty-one million, six hundred thirty-four thousand, three hundred eighty-nine".