223531004 has 24 divisors (see below), whose sum is σ = 398242656. Its totient is φ = 109760000.

The previous prime is 223531001. The next prime is 223531027. The reversal of 223531004 is 400135322.

It is a happy number.

It is a super-2 number, since 2×223531004² = 99932219498496032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223531001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78404 + ... + 81204.

It is an arithmetic number, because the mean of its divisors is an integer number (16593444).

Almost surely, 2^223531004 is an apocalyptic number.

It is an amenable number.

223531004 is a deficient number, since it is larger than the sum of its proper divisors (174711652).

223531004 is a wasteful number, since it uses less digits than its factorization.

223531004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157 (or 3155 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 223531004 is about 14950.9532806440. The cubic root of 223531004 is about 606.8936446229.

Adding to 223531004 its reverse (400135322), we get a palindrome (623666326).

The spelling of 223531004 in words is "two hundred twenty-three million, five hundred thirty-one thousand, four".