51255889 has 4 divisors (see below), whose sum is σ = 51735024. Its totient is φ = 50776756.

The previous prime is 51255887. The next prime is 51255899. The reversal of 51255889 is 98855215.

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 51255889 - 2¹ = 51255887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239407 + ... + 239620.

It is an arithmetic number, because the mean of its divisors is an integer number (12933756).

Almost surely, 2^51255889 is an apocalyptic number.

It is an amenable number.

51255889 is a deficient number, since it is larger than the sum of its proper divisors (479135).

51255889 is a wasteful number, since it uses less digits than its factorization.

51255889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479134.

The product of its digits is 144000, while the sum is 43.

The square root of 51255889 is about 7159.3218254245. The cubic root of 51255889 is about 371.4621688896.

The spelling of 51255889 in words is "fifty-one million, two hundred fifty-five thousand, eight hundred eighty-nine".