223531525 has 12 divisors (see below), whose sum is σ = 316776352. Its totient is φ = 153278640.

The previous prime is 223531519. The next prime is 223531537. The reversal of 223531525 is 525135322.

It is not a de Polignac number, because 223531525 - 2⁵ = 223531493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223531493 and 223531502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638487 + ... + 638836.

Almost surely, 2^223531525 is an apocalyptic number.

223531525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

223531525 is a deficient number, since it is larger than the sum of its proper divisors (93244827).

223531525 is a wasteful number, since it uses less digits than its factorization.

223531525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277340 (or 1277335 counting only the distinct ones).

The product of its digits is 9000, while the sum is 28.

The square root of 223531525 is about 14950.9707042720. The cubic root of 223531525 is about 606.8941161330.

Adding to 223531525 its reverse (525135322), we get a palindrome (748666847).

The spelling of 223531525 in words is "two hundred twenty-three million, five hundred thirty-one thousand, five hundred twenty-five".