55525290 has 16 divisors (see below), whose sum is σ = 133260768. Its totient is φ = 14806736.

The previous prime is 55525279. The next prime is 55525303. The reversal of 55525290 is 9252555.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925392 + ... + 925451.

It is an arithmetic number, because the mean of its divisors is an integer number (8328798).

Almost surely, 2^55525290 is an apocalyptic number.

55525290 is an abundant number, since it is smaller than the sum of its proper divisors (77735478).

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

55525290 is a wasteful number, since it uses less digits than its factorization.

55525290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850853.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55525290 is about 7451.5293732227. The cubic root of 55525290 is about 381.5021107729.

The spelling of 55525290 in words is "fifty-five million, five hundred twenty-five thousand, two hundred ninety".