55423317 has 4 divisors (see below), whose sum is σ = 73897760. Its totient is φ = 36948876.

The previous prime is 55423301. The next prime is 55423343. The reversal of 55423317 is 71332455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55423317 - 2⁴ = 55423301 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 (55423367) 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, 9237217 + ... + 9237222.

It is an arithmetic number, because the mean of its divisors is an integer number (18474440).

Almost surely, 2^55423317 is an apocalyptic number.

It is an amenable number.

55423317 is a deficient number, since it is larger than the sum of its proper divisors (18474443).

55423317 is a wasteful number, since it uses less digits than its factorization.

55423317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18474442.

The product of its digits is 12600, while the sum is 30.

The square root of 55423317 is about 7444.6838079263. The cubic root of 55423317 is about 381.2684229385.

It can be divided in two parts, 554 and 23317, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 55423317 in words is "fifty-five million, four hundred twenty-three thousand, three hundred seventeen".