223699945 has 24 divisors (see below), whose sum is σ = 315519624. Its totient is φ = 151796736.

The previous prime is 223699907. The next prime is 223699961. The reversal of 223699945 is 549996322.

It can be written as a sum of positive squares in 4 ways, for example, as 85895824 + 137804121 = 9268^2 + 11739^2 .

It is not a de Polignac number, because 223699945 - 2¹¹ = 223697897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19059 + ... + 28471.

It is an arithmetic number, because the mean of its divisors is an integer number (13146651).

Almost surely, 2^223699945 is an apocalyptic number.

It is an amenable number.

223699945 is a deficient number, since it is larger than the sum of its proper divisors (91819679).

223699945 is an equidigital number, since it uses as much as digits as its factorization.

223699945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9529 (or 9522 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 223699945 is about 14956.6020539426. The cubic root of 223699945 is about 607.0464994816.

The spelling of 223699945 in words is "two hundred twenty-three million, six hundred ninety-nine thousand, nine hundred forty-five".