223999915221 has 24 divisors (see below), whose sum is σ = 331822333440. Its totient is φ = 145544376096.

The previous prime is 223999915219. The next prime is 223999915229. The reversal of 223999915221 is 122519999322.

It is a happy number.

223999915221 is a `hidden beast` number, since 2 + 23 + 9 + 9 + 9 + 91 + 522 + 1 = 666.

It is not a de Polignac number, because 223999915221 - 2¹ = 223999915219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223999915229) 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, 1006750 + ... + 1208943.

It is an arithmetic number, because the mean of its divisors is an integer number (13825930560).

Almost surely, 2^223999915221 is an apocalyptic number.

It is an amenable number.

223999915221 is a deficient number, since it is larger than the sum of its proper divisors (107822418219).

223999915221 is a wasteful number, since it uses less digits than its factorization.

223999915221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215985 (or 2215982 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The spelling of 223999915221 in words is "two hundred twenty-three billion, nine hundred ninety-nine million, nine hundred fifteen thousand, two hundred twenty-one".