55205790 has 32 divisors (see below), whose sum is σ = 134096256. Its totient is φ = 14543520.

The previous prime is 55205767. The next prime is 55205797. The reversal of 55205790 is 9750255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8596 + ... + 13575.

It is an arithmetic number, because the mean of its divisors is an integer number (4190508).

Almost surely, 2^55205790 is an apocalyptic number.

55205790 is an abundant number, since it is smaller than the sum of its proper divisors (78890466).

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

55205790 is a wasteful number, since it uses less digits than its factorization.

55205790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22264.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 55205790 is about 7430.0598920870. The cubic root of 55205790 is about 380.7689645796.

The spelling of 55205790 in words is "fifty-five million, two hundred five thousand, seven hundred ninety".