223523531 has 16 divisors (see below), whose sum is σ = 295073280. Its totient is φ = 163927680.

The previous prime is 223523477. The next prime is 223523539. The reversal of 223523531 is 135325322.

It is a de Polignac number, because none of the positive numbers 2^k-223523531 is a prime.

It is a super-2 number, since 2×223523531² = 99925537821415922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223523531.

It is not an unprimeable number, because it can be changed into a prime (223523539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84071 + ... + 86688.

It is an arithmetic number, because the mean of its divisors is an integer number (18442080).

Almost surely, 2^223523531 is an apocalyptic number.

223523531 is a deficient number, since it is larger than the sum of its proper divisors (71549749).

223523531 is a wasteful number, since it uses less digits than its factorization.

223523531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170794.

The product of its digits is 5400, while the sum is 26.

The square root of 223523531 is about 14950.7033613807. The cubic root of 223523531 is about 606.8868814049.

Adding to 223523531 its reverse (135325322), we get a palindrome (358848853).

The spelling of 223523531 in words is "two hundred twenty-three million, five hundred twenty-three thousand, five hundred thirty-one".