15425010221 has 2 divisors, whose sum is σ = 15425010222. Its totient is φ = 15425010220.

The previous prime is 15425010203. The next prime is 15425010233. The reversal of 15425010221 is 12201052451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15422907721 + 2102500 = 124189^2 + 1450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15425010221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15425000221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7712505110 + 7712505111.

It is an arithmetic number, because the mean of its divisors is an integer number (7712505111).

Almost surely, 2^15425010221 is an apocalyptic number.

It is an amenable number.

15425010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15425010221 is an equidigital number, since it uses as much as digits as its factorization.

15425010221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 15425010221 its reverse (12201052451), we get a palindrome (27626062672).

The spelling of 15425010221 in words is "fifteen billion, four hundred twenty-five million, ten thousand, two hundred twenty-one".