224154002521 has 2 divisors, whose sum is σ = 224154002522. Its totient is φ = 224154002520.

The previous prime is 224154002491. The next prime is 224154002573. The reversal of 224154002521 is 125200451422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185898945600 + 38255056921 = 431160^2 + 195589^2 .

It is a cyclic number.

It is not a de Polignac number, because 224154002521 - 2⁵ = 224154002489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224154002521.

It is not a weakly prime, because it can be changed into another prime (224154002581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112077001260 + 112077001261.

It is an arithmetic number, because the mean of its divisors is an integer number (112077001261).

Almost surely, 2^224154002521 is an apocalyptic number.

It is an amenable number.

224154002521 is a deficient number, since it is larger than the sum of its proper divisors (1).

224154002521 is an equidigital number, since it uses as much as digits as its factorization.

224154002521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 224154002521 its reverse (125200451422), we get a palindrome (349354453943).

The spelling of 224154002521 in words is "two hundred twenty-four billion, one hundred fifty-four million, two thousand, five hundred twenty-one".