51813844 has 12 divisors (see below), whose sum is σ = 90967968. Its totient is φ = 25823000.

The previous prime is 51813833. The next prime is 51813851. The reversal of 51813844 is 44831815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19582 + ... + 22069.

It is an arithmetic number, because the mean of its divisors is an integer number (7580664).

Almost surely, 2^51813844 is an apocalyptic number.

It is an amenable number.

51813844 is a deficient number, since it is larger than the sum of its proper divisors (39154124).

51813844 is a wasteful number, since it uses less digits than its factorization.

51813844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41966 (or 41964 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 51813844 is about 7198.1833819374. The cubic root of 51813844 is about 372.8051796913.

It can be divided in two parts, 5181 and 3844, that added together give a square (9025 = 95²).

The spelling of 51813844 in words is "fifty-one million, eight hundred thirteen thousand, eight hundred forty-four".