51866814 has 16 divisors (see below), whose sum is σ = 104279040. Its totient is φ = 17198040.

The previous prime is 51866809. The next prime is 51866831. The reversal of 51866814 is 41866815.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21484 + ... + 23775.

It is an arithmetic number, because the mean of its divisors is an integer number (6517440).

Almost surely, 2^51866814 is an apocalyptic number.

51866814 is an abundant number, since it is smaller than the sum of its proper divisors (52412226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51866814 is a wasteful number, since it uses less digits than its factorization.

51866814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45455.

The product of its digits is 46080, while the sum is 39.

The square root of 51866814 is about 7201.8618426071. The cubic root of 51866814 is about 372.9321776985.

Subtracting from 51866814 its reverse (41866815), we obtain a palindrome (9999999).

The spelling of 51866814 in words is "fifty-one million, eight hundred sixty-six thousand, eight hundred fourteen".