55799191 has 12 divisors (see below), whose sum is σ = 66012840. Its totient is φ = 47014800.

The previous prime is 55799147. The next prime is 55799203. The reversal of 55799191 is 19199755.

It is not a de Polignac number, because 55799191 - 2¹¹ = 55797143 is a prime.

It is a super-2 number, since 2×55799191² = 6227099432508962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55799131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6760 + ... + 12541.

It is an arithmetic number, because the mean of its divisors is an integer number (5501070).

Almost surely, 2^55799191 is an apocalyptic number.

55799191 is a deficient number, since it is larger than the sum of its proper divisors (10213649).

55799191 is a wasteful number, since it uses less digits than its factorization.

55799191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19374 (or 19367 counting only the distinct ones).

The product of its digits is 127575, while the sum is 46.

The square root of 55799191 is about 7469.8856082272. The cubic root of 55799191 is about 382.1283867132.

The spelling of 55799191 in words is "fifty-five million, seven hundred ninety-nine thousand, one hundred ninety-one".