55250290 has 16 divisors (see below), whose sum is σ = 104685120. Its totient is φ = 20936880.

The previous prime is 55250281. The next prime is 55250291. The reversal of 55250290 is 9205255.

55250290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55250291) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 145206 + ... + 145585.

It is an arithmetic number, because the mean of its divisors is an integer number (6542820).

Almost surely, 2^55250290 is an apocalyptic number.

55250290 is a deficient number, since it is larger than the sum of its proper divisors (49434830).

55250290 is a wasteful number, since it uses less digits than its factorization.

55250290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290817.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 55250290 is about 7433.0538811447. The cubic root of 55250290 is about 380.8712465334.

The spelling of 55250290 in words is "fifty-five million, two hundred fifty thousand, two hundred ninety".