55426217 has 8 divisors (see below), whose sum is σ = 69102912. Its totient is φ = 43189200.

The previous prime is 55426213. The next prime is 55426223. The reversal of 55426217 is 71262455.

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 55426217 - 2² = 55426213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55426213) 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, 359834 + ... + 359987.

It is an arithmetic number, because the mean of its divisors is an integer number (8637864).

Almost surely, 2^55426217 is an apocalyptic number.

It is an amenable number.

55426217 is a deficient number, since it is larger than the sum of its proper divisors (13676695).

55426217 is a wasteful number, since it uses less digits than its factorization.

55426217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719839.

The product of its digits is 16800, while the sum is 32.

The square root of 55426217 is about 7444.8785752355. The cubic root of 55426217 is about 381.2750727218.

The spelling of 55426217 in words is "fifty-five million, four hundred twenty-six thousand, two hundred seventeen".