225445531 has 4 divisors (see below), whose sum is σ = 226060192. Its totient is φ = 224830872.

The previous prime is 225445523. The next prime is 225445543. The reversal of 225445531 is 135544522.

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 225445531 - 2³ = 225445523 is a prime.

It is a super-2 number, since 2×225445531² = 101651374895743922, 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 = 225445493 and 225445502.

It is not an unprimeable number, because it can be changed into a prime (225449531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306780 + ... + 307513.

It is an arithmetic number, because the mean of its divisors is an integer number (56515048).

Almost surely, 2^225445531 is an apocalyptic number.

225445531 is a deficient number, since it is larger than the sum of its proper divisors (614661).

225445531 is an equidigital number, since it uses as much as digits as its factorization.

225445531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614660.

The product of its digits is 24000, while the sum is 31.

The square root of 225445531 is about 15014.8436888301. The cubic root of 225445531 is about 608.6213881356.

The spelling of 225445531 in words is "two hundred twenty-five million, four hundred forty-five thousand, five hundred thirty-one".