223639855 has 4 divisors (see below), whose sum is σ = 268367832. Its totient is φ = 178911880.

The previous prime is 223639837. The next prime is 223639873. The reversal of 223639855 is 558936322.

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

It is an interprime number because it is at equal distance from previous prime (223639837) and next prime (223639873).

It is not a de Polignac number, because 223639855 - 2¹⁷ = 223508783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22363981 + ... + 22363990.

It is an arithmetic number, because the mean of its divisors is an integer number (67091958).

Almost surely, 2^223639855 is an apocalyptic number.

223639855 is a deficient number, since it is larger than the sum of its proper divisors (44727977).

223639855 is an equidigital number, since it uses as much as digits as its factorization.

223639855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44727976.

The product of its digits is 388800, while the sum is 43.

The square root of 223639855 is about 14954.5931071360. The cubic root of 223639855 is about 606.9921399230.

The spelling of 223639855 in words is "two hundred twenty-three million, six hundred thirty-nine thousand, eight hundred fifty-five".