51986590 has 16 divisors (see below), whose sum is σ = 93703680. Its totient is φ = 20766240.

The previous prime is 51986581. The next prime is 51986609. The reversal of 51986590 is 9568915.

It is a happy number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 5155 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (5856480).

Almost surely, 2^51986590 is an apocalyptic number.

51986590 is a deficient number, since it is larger than the sum of its proper divisors (41717090).

51986590 is a wasteful number, since it uses less digits than its factorization.

51986590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 51986590 is about 7210.1726747700. The cubic root of 51986590 is about 373.2190276831.

The spelling of 51986590 in words is "fifty-one million, nine hundred eighty-six thousand, five hundred ninety".