55253217 has 8 divisors (see below), whose sum is σ = 74386624. Its totient is φ = 36477648.

The previous prime is 55253147. The next prime is 55253221. The reversal of 55253217 is 71235255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55253217 - 2⁷ = 55253089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55253227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89098 + ... + 89715.

It is an arithmetic number, because the mean of its divisors is an integer number (9298328).

Almost surely, 2^55253217 is an apocalyptic number.

It is an amenable number.

55253217 is a deficient number, since it is larger than the sum of its proper divisors (19133407).

55253217 is a wasteful number, since it uses less digits than its factorization.

55253217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178919.

The product of its digits is 10500, while the sum is 30.

The square root of 55253217 is about 7433.2507693472. The cubic root of 55253217 is about 380.8779722323.

The spelling of 55253217 in words is "fifty-five million, two hundred fifty-three thousand, two hundred seventeen".