55352217 has 4 divisors (see below), whose sum is σ = 73802960. Its totient is φ = 36901476.

The previous prime is 55352201. The next prime is 55352243. The reversal of 55352217 is 71225355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55352217 - 2⁴ = 55352201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55352257) 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, 9225367 + ... + 9225372.

It is an arithmetic number, because the mean of its divisors is an integer number (18450740).

Almost surely, 2^55352217 is an apocalyptic number.

It is an amenable number.

55352217 is a deficient number, since it is larger than the sum of its proper divisors (18450743).

55352217 is a wasteful number, since it uses less digits than its factorization.

55352217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450742.

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

The square root of 55352217 is about 7439.9070558711. The cubic root of 55352217 is about 381.1053159855.

The spelling of 55352217 in words is "fifty-five million, three hundred fifty-two thousand, two hundred seventeen".