51880990 has 32 divisors (see below), whose sum is σ = 109335744. Its totient is φ = 17352960.

The previous prime is 51880987. The next prime is 51881003. The reversal of 51880990 is 9908815.

51880990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 6169 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (3416742).

Almost surely, 2^51880990 is an apocalyptic number.

51880990 is an abundant number, since it is smaller than the sum of its proper divisors (57454754).

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

51880990 is a wasteful number, since it uses less digits than its factorization.

51880990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18132.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 51880990 is about 7202.8459653112. The cubic root of 51880990 is about 372.9661506418.

The spelling of 51880990 in words is "fifty-one million, eight hundred eighty thousand, nine hundred ninety".