225404531 has 8 divisors (see below), whose sum is σ = 256587264. Its totient is φ = 196003720.

The previous prime is 225404489. The next prime is 225404551. The reversal of 225404531 is 135404522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225404531 - 2¹⁴ = 225388147 is a prime.

It is a super-2 number, since 2×225404531² = 101614405190659922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225404531.

It is not an unprimeable number, because it can be changed into a prime (225404551) 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, 445211 + ... + 445716.

It is an arithmetic number, because the mean of its divisors is an integer number (32073408).

Almost surely, 2^225404531 is an apocalyptic number.

225404531 is a deficient number, since it is larger than the sum of its proper divisors (31182733).

225404531 is a wasteful number, since it uses less digits than its factorization.

225404531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890961.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 225404531 is about 15013.4783111709. The cubic root of 225404531 is about 608.5844908422.

Subtracting from 225404531 its reverse (135404522), we obtain a palindrome (90000009).

The spelling of 225404531 in words is "two hundred twenty-five million, four hundred four thousand, five hundred thirty-one".