55406023 has 4 divisors (see below), whose sum is σ = 55602088. Its totient is φ = 55209960.

The previous prime is 55405993. The next prime is 55406081. The reversal of 55406023 is 32060455.

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 55406023 - 2²⁵ = 21851591 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 (55406093) 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, 97608 + ... + 98173.

It is an arithmetic number, because the mean of its divisors is an integer number (13900522).

Almost surely, 2^55406023 is an apocalyptic number.

55406023 is a deficient number, since it is larger than the sum of its proper divisors (196065).

55406023 is a wasteful number, since it uses less digits than its factorization.

55406023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196064.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 55406023 is about 7443.5222173377. The cubic root of 55406023 is about 381.2287624827.

Adding to 55406023 its reverse (32060455), we get a palindrome (87466478).

The spelling of 55406023 in words is "fifty-five million, four hundred six thousand, twenty-three".