224501561 has 2 divisors, whose sum is σ = 224501562. Its totient is φ = 224501560.

The previous prime is 224501539. The next prime is 224501567. The reversal of 224501561 is 165105422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214798336 + 9703225 = 14656^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 224501561 - 2¹⁰ = 224500537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224501561.

It is not a weakly prime, because it can be changed into another prime (224501567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112250780 + 112250781.

It is an arithmetic number, because the mean of its divisors is an integer number (112250781).

Almost surely, 2^224501561 is an apocalyptic number.

It is an amenable number.

224501561 is a deficient number, since it is larger than the sum of its proper divisors (1).

224501561 is an equidigital number, since it uses as much as digits as its factorization.

224501561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 224501561 is about 14983.3761549258. The cubic root of 224501561 is about 607.7707405850.

Adding to 224501561 its reverse (165105422), we get a palindrome (389606983).

The spelling of 224501561 in words is "two hundred twenty-four million, five hundred one thousand, five hundred sixty-one".