55318427 has 4 divisors (see below), whose sum is σ = 57723600. Its totient is φ = 52913256.

The previous prime is 55318423. The next prime is 55318433. The reversal of 55318427 is 72481355.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72481355 = 5 ⋅14496271.

It is a cyclic number.

It is not a de Polignac number, because 55318427 - 2² = 55318423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55318423) 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, 1202552 + ... + 1202597.

It is an arithmetic number, because the mean of its divisors is an integer number (14430900).

Almost surely, 2^55318427 is an apocalyptic number.

55318427 is a deficient number, since it is larger than the sum of its proper divisors (2405173).

55318427 is a wasteful number, since it uses less digits than its factorization.

55318427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405172.

The product of its digits is 33600, while the sum is 35.

The square root of 55318427 is about 7437.6358474989. The cubic root of 55318427 is about 381.0277510712.

The spelling of 55318427 in words is "fifty-five million, three hundred eighteen thousand, four hundred twenty-seven".