223725638 has 4 divisors (see below), whose sum is σ = 335588460. Its totient is φ = 111862818.

The previous prime is 223725637. The next prime is 223725641. The reversal of 223725638 is 836527322.

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

It is a super-2 number, since 2×223725638² = 100106322197014088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223725637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55931408 + ... + 55931411.

It is an arithmetic number, because the mean of its divisors is an integer number (83897115).

Almost surely, 2^223725638 is an apocalyptic number.

223725638 is a deficient number, since it is larger than the sum of its proper divisors (111862822).

223725638 is a wasteful number, since it uses less digits than its factorization.

223725638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111862821.

The product of its digits is 120960, while the sum is 38.

The square root of 223725638 is about 14957.4609476341. The cubic root of 223725638 is about 607.0697393154.

The spelling of 223725638 in words is "two hundred twenty-three million, seven hundred twenty-five thousand, six hundred thirty-eight".