51264389 has 8 divisors (see below), whose sum is σ = 55987200. Its totient is φ = 46552000.

The previous prime is 51264383. The next prime is 51264397. The reversal of 51264389 is 98346215.

It is a happy number.

51264389 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 not a de Polignac number, because 51264389 - 2⁸ = 51264133 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 (51264383) 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, 10637 + ... + 14685.

It is an arithmetic number, because the mean of its divisors is an integer number (6998400).

Almost surely, 2^51264389 is an apocalyptic number.

It is an amenable number.

51264389 is a deficient number, since it is larger than the sum of its proper divisors (4722811).

51264389 is a wasteful number, since it uses less digits than its factorization.

51264389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211.

The product of its digits is 51840, while the sum is 38.

The square root of 51264389 is about 7159.9154324615. The cubic root of 51264389 is about 371.4827015150.

The spelling of 51264389 in words is "fifty-one million, two hundred sixty-four thousand, three hundred eighty-nine".