15251140321 has 2 divisors, whose sum is σ = 15251140322. Its totient is φ = 15251140320.

The previous prime is 15251140241. The next prime is 15251140337. The reversal of 15251140321 is 12304115251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12747539025 + 2503601296 = 112905^2 + 50036^2 .

It is a cyclic number.

It is not a de Polignac number, because 15251140321 - 2⁷ = 15251140193 is a prime.

It is not a weakly prime, because it can be changed into another prime (15251140361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7625570160 + 7625570161.

It is an arithmetic number, because the mean of its divisors is an integer number (7625570161).

Almost surely, 2^15251140321 is an apocalyptic number.

It is an amenable number.

15251140321 is a deficient number, since it is larger than the sum of its proper divisors (1).

15251140321 is an equidigital number, since it uses as much as digits as its factorization.

15251140321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 15251140321 its reverse (12304115251), we get a palindrome (27555255572).

The spelling of 15251140321 in words is "fifteen billion, two hundred fifty-one million, one hundred forty thousand, three hundred twenty-one".