55533623 has 4 divisors (see below), whose sum is σ = 55576800. Its totient is φ = 55490448.

The previous prime is 55533601. The next prime is 55533631. The reversal of 55533623 is 32633555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55533623 is a prime.

It is a super-2 number, since 2×55533623² = 6167966567012258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55533623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55533923) 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, 19598 + ... + 22251.

It is an arithmetic number, because the mean of its divisors is an integer number (13894200).

Almost surely, 2^55533623 is an apocalyptic number.

55533623 is a deficient number, since it is larger than the sum of its proper divisors (43177).

55533623 is a wasteful number, since it uses less digits than its factorization.

55533623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43176.

The product of its digits is 40500, while the sum is 32.

The square root of 55533623 is about 7452.0884992061. The cubic root of 55533623 is about 381.5211945578.

The spelling of 55533623 in words is "fifty-five million, five hundred thirty-three thousand, six hundred twenty-three".