51816290 has 16 divisors (see below), whose sum is σ = 95439168. Its totient is φ = 20244336.

The previous prime is 51816257. The next prime is 51816329. The reversal of 51816290 is 9261815.

51816290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59822 + ... + 60681.

It is an arithmetic number, because the mean of its divisors is an integer number (5964948).

Almost surely, 2^51816290 is an apocalyptic number.

51816290 is a deficient number, since it is larger than the sum of its proper divisors (43622878).

51816290 is a wasteful number, since it uses less digits than its factorization.

51816290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120553.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 51816290 is about 7198.3532839115. The cubic root of 51816290 is about 372.8110459942.

The spelling of 51816290 in words is "fifty-one million, eight hundred sixteen thousand, two hundred ninety".