224253521 has 2 divisors, whose sum is σ = 224253522. Its totient is φ = 224253520.

The previous prime is 224253451. The next prime is 224253551. The reversal of 224253521 is 125352422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216413521 + 7840000 = 14711^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 224253521 - 2¹⁴ = 224237137 is a prime.

It is not a weakly prime, because it can be changed into another prime (224253551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112126760 + 112126761.

It is an arithmetic number, because the mean of its divisors is an integer number (112126761).

Almost surely, 2^224253521 is an apocalyptic number.

It is an amenable number.

224253521 is a deficient number, since it is larger than the sum of its proper divisors (1).

224253521 is an equidigital number, since it uses as much as digits as its factorization.

224253521 is an evil number, because the sum of its binary digits is even.

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

The square root of 224253521 is about 14975.0966941786. The cubic root of 224253521 is about 607.5468267630.

The spelling of 224253521 in words is "two hundred twenty-four million, two hundred fifty-three thousand, five hundred twenty-one".