224965981 has 18 divisors (see below), whose sum is σ = 245245722. Its totient is φ = 206317440.

The previous prime is 224965943. The next prime is 224966003. The reversal of 224965981 is 189569422.

It can be written as a sum of positive squares in 3 ways, for example, as 23609881 + 201356100 = 4859^2 + 14190^2 .

It is not a de Polignac number, because 224965981 - 2¹⁵ = 224933213 is a prime.

It is a super-2 number, since 2×224965981² = 101219385214584722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224965901) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 534151 + ... + 534571.

Almost surely, 2^224965981 is an apocalyptic number.

It is an amenable number.

224965981 is a deficient number, since it is larger than the sum of its proper divisors (20279741).

224965981 is an equidigital number, since it uses as much as digits as its factorization.

224965981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 481 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 224965981 is about 14998.8659904674. The cubic root of 224965981 is about 608.1895446153.

The spelling of 224965981 in words is "two hundred twenty-four million, nine hundred sixty-five thousand, nine hundred eighty-one".