15144050221 has 2 divisors, whose sum is σ = 15144050222. Its totient is φ = 15144050220.

The previous prime is 15144050209. The next prime is 15144050227. The reversal of 15144050221 is 12205044151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13374922500 + 1769127721 = 115650^2 + 42061^2 .

It is a cyclic number.

It is not a de Polignac number, because 15144050221 - 2⁹ = 15144049709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15144050227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7572025110 + 7572025111.

It is an arithmetic number, because the mean of its divisors is an integer number (7572025111).

Almost surely, 2^15144050221 is an apocalyptic number.

It is an amenable number.

15144050221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15144050221 is an equidigital number, since it uses as much as digits as its factorization.

15144050221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 15144050221 its reverse (12205044151), we get a palindrome (27349094372).

The spelling of 15144050221 in words is "fifteen billion, one hundred forty-four million, fifty thousand, two hundred twenty-one".