55217395 has 4 divisors (see below), whose sum is σ = 66260880. Its totient is φ = 44173912.

The previous prime is 55217389. The next prime is 55217443. The reversal of 55217395 is 59371255.

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: 59371255 = 5 ⋅11874251.

It is a cyclic number.

It is not a de Polignac number, because 55217395 - 2³ = 55217387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5521735 + ... + 5521744.

It is an arithmetic number, because the mean of its divisors is an integer number (16565220).

Almost surely, 2^55217395 is an apocalyptic number.

55217395 is a deficient number, since it is larger than the sum of its proper divisors (11043485).

55217395 is a wasteful number, since it uses less digits than its factorization.

55217395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11043484.

The product of its digits is 47250, while the sum is 37.

The square root of 55217395 is about 7430.8408003402. The cubic root of 55217395 is about 380.7956436304.

The spelling of 55217395 in words is "fifty-five million, two hundred seventeen thousand, three hundred ninety-five".