55028823 has 4 divisors (see below), whose sum is σ = 73371768. Its totient is φ = 36685880.

The previous prime is 55028821. The next prime is 55028839. The reversal of 55028823 is 32882055.

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 55028823 - 2¹ = 55028821 is a prime.

It is a super-3 number, since 3×55028823³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55028821) 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, 9171468 + ... + 9171473.

It is an arithmetic number, because the mean of its divisors is an integer number (18342942).

Almost surely, 2^55028823 is an apocalyptic number.

55028823 is a deficient number, since it is larger than the sum of its proper divisors (18342945).

55028823 is a wasteful number, since it uses less digits than its factorization.

55028823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18342944.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 55028823 is about 7418.1414788342. The cubic root of 55028823 is about 380.3616662923.

The spelling of 55028823 in words is "fifty-five million, twenty-eight thousand, eight hundred twenty-three".