51883921 has 4 divisors (see below), whose sum is σ = 52053232. Its totient is φ = 51714612.

The previous prime is 51883859. The next prime is 51883933. The reversal of 51883921 is 12938815.

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 51883921 - 2¹⁵ = 51851153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51883021) 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, 84195 + ... + 84808.

It is an arithmetic number, because the mean of its divisors is an integer number (13013308).

Almost surely, 2^51883921 is an apocalyptic number.

It is an amenable number.

51883921 is a deficient number, since it is larger than the sum of its proper divisors (169311).

51883921 is a wasteful number, since it uses less digits than its factorization.

51883921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169310.

The product of its digits is 17280, while the sum is 37.

The square root of 51883921 is about 7203.0494236816. The cubic root of 51883921 is about 372.9731740441.

The spelling of 51883921 in words is "fifty-one million, eight hundred eighty-three thousand, nine hundred twenty-one".