15250715261 has 2 divisors, whose sum is σ = 15250715262. Its totient is φ = 15250715260.

The previous prime is 15250715213. The next prime is 15250715303. The reversal of 15250715261 is 16251705251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10734203236 + 4516512025 = 103606^2 + 67205^2 .

It is an emirp because it is prime and its reverse (16251705251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15250715261 - 2²² = 15246520957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15250715201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7625357630 + 7625357631.

It is an arithmetic number, because the mean of its divisors is an integer number (7625357631).

Almost surely, 2^15250715261 is an apocalyptic number.

It is an amenable number.

15250715261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15250715261 is an equidigital number, since it uses as much as digits as its factorization.

15250715261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 15250715261 in words is "fifteen billion, two hundred fifty million, seven hundred fifteen thousand, two hundred sixty-one".