55455590 has 16 divisors (see below), whose sum is σ = 103040640. Its totient is φ = 21466560.

The previous prime is 55455583. The next prime is 55455611. The reversal of 55455590 is 9555455.

It is a super-3 number, since 3×55455590³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89135 + ... + 89754.

It is an arithmetic number, because the mean of its divisors is an integer number (6440040).

Almost surely, 2^55455590 is an apocalyptic number.

55455590 is a deficient number, since it is larger than the sum of its proper divisors (47585050).

55455590 is a wasteful number, since it uses less digits than its factorization.

55455590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178927.

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 55455590 is about 7446.8510123407. The cubic root of 55455590 is about 381.3424127855.

The spelling of 55455590 in words is "fifty-five million, four hundred fifty-five thousand, five hundred ninety".