224985521 has 2 divisors, whose sum is σ = 224985522. Its totient is φ = 224985520.

The previous prime is 224985511. The next prime is 224985533. The reversal of 224985521 is 125589422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209931121 + 15054400 = 14489^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 224985521 - 2⁶ = 224985457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (224985511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112492760 + 112492761.

It is an arithmetic number, because the mean of its divisors is an integer number (112492761).

Almost surely, 2^224985521 is an apocalyptic number.

It is an amenable number.

224985521 is a deficient number, since it is larger than the sum of its proper divisors (1).

224985521 is an equidigital number, since it uses as much as digits as its factorization.

224985521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 224985521 is about 14999.5173589019. The cubic root of 224985521 is about 608.2071527289.

The spelling of 224985521 in words is "two hundred twenty-four million, nine hundred eighty-five thousand, five hundred twenty-one".