51953818 has 24 divisors (see below), whose sum is σ = 91552032. Its totient is φ = 22045464.

The previous prime is 51953801. The next prime is 51953831. The reversal of 51953818 is 81835915.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7521 + ... + 12667.

It is an arithmetic number, because the mean of its divisors is an integer number (3814668).

Almost surely, 2^51953818 is an apocalyptic number.

51953818 is a deficient number, since it is larger than the sum of its proper divisors (39598214).

51953818 is a wasteful number, since it uses less digits than its factorization.

51953818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266 (or 5259 counting only the distinct ones).

The product of its digits is 43200, while the sum is 40.

The square root of 51953818 is about 7207.8996940856. The cubic root of 51953818 is about 373.1405862683.

The spelling of 51953818 in words is "fifty-one million, nine hundred fifty-three thousand, eight hundred eighteen".