55623091 has 4 divisors (see below), whose sum is σ = 55659312. Its totient is φ = 55586872.

The previous prime is 55623077. The next prime is 55623097. The reversal of 55623091 is 19032655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55623091 - 2²⁵ = 22068659 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55623097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15700 + ... + 18913.

It is an arithmetic number, because the mean of its divisors is an integer number (13914828).

Almost surely, 2^55623091 is an apocalyptic number.

55623091 is a deficient number, since it is larger than the sum of its proper divisors (36221).

55623091 is a wasteful number, since it uses less digits than its factorization.

55623091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36220.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 55623091 is about 7458.0889643393. The cubic root of 55623091 is about 381.7259691440.

The spelling of 55623091 in words is "fifty-five million, six hundred twenty-three thousand, ninety-one".