51554790 has 192 divisors, whose sum is σ = 166233600. Its totient is φ = 10824192.

The previous prime is 51554759. The next prime is 51554803. The reversal of 51554790 is 9745515.

51554790 is a `hidden beast` number, since 515 + 54 + 7 + 90 = 666.

51554790 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 95 ways as a sum of consecutive naturals, for example, 706194 + ... + 706266.

It is an arithmetic number, because the mean of its divisors is an integer number (865800).

Almost surely, 2^51554790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51554790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83116800).

51554790 is an abundant number, since it is smaller than the sum of its proper divisors (114678810).

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

51554790 is a wasteful number, since it uses less digits than its factorization.

51554790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 51554790 is about 7180.1664326114. The cubic root of 51554790 is about 372.1828358942.

The spelling of 51554790 in words is "fifty-one million, five hundred fifty-four thousand, seven hundred ninety".