55530023 has 4 divisors (see below), whose sum is σ = 56312208. Its totient is φ = 54747840.

The previous prime is 55530019. The next prime is 55530029. The reversal of 55530023 is 32003555.

It is a happy number.

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 55530023 - 2² = 55530019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530029) 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, 390986 + ... + 391127.

It is an arithmetic number, because the mean of its divisors is an integer number (14078052).

Almost surely, 2^55530023 is an apocalyptic number.

55530023 is a deficient number, since it is larger than the sum of its proper divisors (782185).

55530023 is an equidigital number, since it uses as much as digits as its factorization.

55530023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782184.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 55530023 is about 7451.8469522663. The cubic root of 55530023 is about 381.5129502671.

Adding to 55530023 its reverse (32003555), we get a palindrome (87533578).

The spelling of 55530023 in words is "fifty-five million, five hundred thirty thousand, twenty-three".