51811204 has 27 divisors (see below), whose sum is σ = 93769221. Its totient is φ = 25049040.

The previous prime is 51811183. The next prime is 51811213. The reversal of 51811204 is 40211815.

The square root of 51811204 is 7198.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1684804 + 50126400 = 1298^2 + 7080^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 849334 + ... + 849394.

Almost surely, 2^51811204 is an apocalyptic number.

51811204 is the 7198-th square number.

It is an amenable number.

51811204 is a deficient number, since it is larger than the sum of its proper divisors (41958017).

51811204 is an equidigital number, since it uses as much as digits as its factorization.

51811204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The cubic root of 51811204 is about 372.7988479061.

The spelling of 51811204 in words is "fifty-one million, eight hundred eleven thousand, two hundred four".