51548990 has 32 divisors (see below), whose sum is σ = 94431744. Its totient is φ = 20258560.

The previous prime is 51548977. The next prime is 51549007. The reversal of 51548990 is 9984515.

It is a happy number.

51548990 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, 261572 + ... + 261768.

It is an arithmetic number, because the mean of its divisors is an integer number (2950992).

Almost surely, 2^51548990 is an apocalyptic number.

51548990 is a deficient number, since it is larger than the sum of its proper divisors (42882754).

51548990 is a wasteful number, since it uses less digits than its factorization.

51548990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 51548990 is about 7179.7625308920. The cubic root of 51548990 is about 372.1688783072.

The spelling of 51548990 in words is "fifty-one million, five hundred forty-eight thousand, nine hundred ninety".