55190591 has 8 divisors (see below), whose sum is σ = 55954800. Its totient is φ = 54429760.

The previous prime is 55190581. The next prime is 55190617. The reversal of 55190591 is 19509155.

It is a happy number.

55190591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55190591 - 2²² = 50996287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55190521) 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, 58181 + ... + 59121.

It is an arithmetic number, because the mean of its divisors is an integer number (6994350).

Almost surely, 2^55190591 is an apocalyptic number.

55190591 is a deficient number, since it is larger than the sum of its proper divisors (764209).

55190591 is an equidigital number, since it uses as much as digits as its factorization.

55190591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689.

The product of its (nonzero) digits is 10125, while the sum is 35.

The square root of 55190591 is about 7429.0370170029. The cubic root of 55190591 is about 380.7340175285.

The spelling of 55190591 in words is "fifty-five million, one hundred ninety thousand, five hundred ninety-one".