55388193 has 32 divisors (see below), whose sum is σ = 90222336. Its totient is φ = 29503488.

The previous prime is 55388189. The next prime is 55388219. The reversal of 55388193 is 39188355.

It is not a de Polignac number, because 55388193 - 2² = 55388189 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55388153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39655 + ... + 41027.

It is an arithmetic number, because the mean of its divisors is an integer number (2819448).

Almost surely, 2^55388193 is an apocalyptic number.

It is an amenable number.

55388193 is a deficient number, since it is larger than the sum of its proper divisors (34834143).

55388193 is a wasteful number, since it uses less digits than its factorization.

55388193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513.

The product of its digits is 129600, while the sum is 42.

The square root of 55388193 is about 7442.3244352823. The cubic root of 55388193 is about 381.1878641727.

It can be divided in two parts, 5538 and 8193, that added together give a palindrome (13731).

The spelling of 55388193 in words is "fifty-five million, three hundred eighty-eight thousand, one hundred ninety-three".