224509381 has 2 divisors, whose sum is σ = 224509382. Its totient is φ = 224509380.

The previous prime is 224509349. The next prime is 224509391. The reversal of 224509381 is 183905422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138650625 + 85858756 = 11775^2 + 9266^2 .

It is a cyclic number.

It is not a de Polignac number, because 224509381 - 2⁵ = 224509349 is a prime.

It is a super-2 number, since 2×224509381² = 100808924314006322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224509391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112254690 + 112254691.

It is an arithmetic number, because the mean of its divisors is an integer number (112254691).

Almost surely, 2^224509381 is an apocalyptic number.

It is an amenable number.

224509381 is a deficient number, since it is larger than the sum of its proper divisors (1).

224509381 is an equidigital number, since it uses as much as digits as its factorization.

224509381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 224509381 is about 14983.6371085261. The cubic root of 224509381 is about 607.7777972724. Note that the first 4 decimals are identical.

The spelling of 224509381 in words is "two hundred twenty-four million, five hundred nine thousand, three hundred eighty-one".