223618213 has 24 divisors (see below), whose sum is σ = 292336128. Its totient is φ = 169225056.

The previous prime is 223618211. The next prime is 223618231. The reversal of 223618213 is 312816322.

It is not a de Polignac number, because 223618213 - 2¹ = 223618211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223618211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7020 + ... + 22282.

It is an arithmetic number, because the mean of its divisors is an integer number (12180672).

Almost surely, 2^223618213 is an apocalyptic number.

223618213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

223618213 is a deficient number, since it is larger than the sum of its proper divisors (68717915).

223618213 is a wasteful number, since it uses less digits than its factorization.

223618213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15313 (or 15306 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 223618213 is about 14953.8694992300. The cubic root of 223618213 is about 606.9725594124.

It can be divided in two parts, 2236 and 18213, that added together give a square (20449 = 143²).

The spelling of 223618213 in words is "two hundred twenty-three million, six hundred eighteen thousand, two hundred thirteen".