55662223 has 4 divisors (see below), whose sum is σ = 57581640. Its totient is φ = 53742808.

The previous prime is 55662221. The next prime is 55662247. The reversal of 55662223 is 32226655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55662223 - 2¹ = 55662221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55662221) 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, 959665 + ... + 959722.

It is an arithmetic number, because the mean of its divisors is an integer number (14395410).

Almost surely, 2^55662223 is an apocalyptic number.

55662223 is a deficient number, since it is larger than the sum of its proper divisors (1919417).

55662223 is a wasteful number, since it uses less digits than its factorization.

55662223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919416.

The product of its digits is 21600, while the sum is 31.

The square root of 55662223 is about 7460.7119633451. The cubic root of 55662223 is about 381.8154655428.

Adding to 55662223 its reverse (32226655), we get a palindrome (87888878).

The spelling of 55662223 in words is "fifty-five million, six hundred sixty-two thousand, two hundred twenty-three".