55982217 has 8 divisors (see below), whose sum is σ = 76231296. Its totient is φ = 36527312.

The previous prime is 55982183. The next prime is 55982219. The reversal of 55982217 is 71228955.

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

It is a cyclic number.

It is not a de Polignac number, because 55982217 - 2⁶ = 55982153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55982219) 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, 198378 + ... + 198659.

It is an arithmetic number, because the mean of its divisors is an integer number (9528912).

Almost surely, 2^55982217 is an apocalyptic number.

It is an amenable number.

55982217 is a deficient number, since it is larger than the sum of its proper divisors (20249079).

55982217 is a wasteful number, since it uses less digits than its factorization.

55982217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397087.

The product of its digits is 50400, while the sum is 39.

The square root of 55982217 is about 7482.1265025392. The cubic root of 55982217 is about 382.5457350584.

The spelling of 55982217 in words is "fifty-five million, nine hundred eighty-two thousand, two hundred seventeen".