51990324 has 12 divisors (see below), whose sum is σ = 121310784. Its totient is φ = 17330104.

The previous prime is 51990307. The next prime is 51990343. The reversal of 51990324 is 42309915.

51990324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2166252 + ... + 2166275.

It is an arithmetic number, because the mean of its divisors is an integer number (10109232).

Almost surely, 2^51990324 is an apocalyptic number.

It is an amenable number.

51990324 is an abundant number, since it is smaller than the sum of its proper divisors (69320460).

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

51990324 is a wasteful number, since it uses less digits than its factorization.

51990324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332534 (or 4332532 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 51990324 is about 7210.4316098275. The cubic root of 51990324 is about 373.2279631059.

The spelling of 51990324 in words is "fifty-one million, nine hundred ninety thousand, three hundred twenty-four".