223725631 has 4 divisors (see below), whose sum is σ = 223812064. Its totient is φ = 223639200.

The previous prime is 223725571. The next prime is 223725637. The reversal of 223725631 is 136527322.

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

It is a cyclic number.

It is not a de Polignac number, because 223725631 - 2¹⁷ = 223594559 is a prime.

It is a super-2 number, since 2×223725631² = 100106315932696322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223725593 and 223725602.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39210 + ... + 44551.

It is an arithmetic number, because the mean of its divisors is an integer number (55953016).

Almost surely, 2^223725631 is an apocalyptic number.

223725631 is a deficient number, since it is larger than the sum of its proper divisors (86433).

223725631 is an equidigital number, since it uses as much as digits as its factorization.

223725631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86432.

The product of its digits is 15120, while the sum is 31.

The square root of 223725631 is about 14957.4607136372. The cubic root of 223725631 is about 607.0697329840.

The spelling of 223725631 in words is "two hundred twenty-three million, seven hundred twenty-five thousand, six hundred thirty-one".