55091598 has 32 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 17865120.

The previous prime is 55091593. The next prime is 55091609. The reversal of 55091598 is 89519055.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55091591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32836 + ... + 34472.

It is an arithmetic number, because the mean of its divisors is an integer number (3538080).

Almost surely, 2^55091598 is an apocalyptic number.

55091598 is an abundant number, since it is smaller than the sum of its proper divisors (58126962).

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

55091598 is a wasteful number, since it uses less digits than its factorization.

55091598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792.

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 55091598 is about 7422.3714539223. The cubic root of 55091598 is about 380.5062458576.

The spelling of 55091598 in words is "fifty-five million, ninety-one thousand, five hundred ninety-eight".