15250948781 has 2 divisors, whose sum is σ = 15250948782. Its totient is φ = 15250948780.

The previous prime is 15250948753. The next prime is 15250948799. The reversal of 15250948781 is 18784905251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14973193225 + 277755556 = 122365^2 + 16666^2 .

It is a cyclic number.

It is not a de Polignac number, because 15250948781 - 2¹⁴ = 15250932397 is a prime.

It is a super-2 number, since 2×15250948781² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15250968781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7625474390 + 7625474391.

It is an arithmetic number, because the mean of its divisors is an integer number (7625474391).

Almost surely, 2^15250948781 is an apocalyptic number.

It is an amenable number.

15250948781 is a deficient number, since it is larger than the sum of its proper divisors (1).

15250948781 is an equidigital number, since it uses as much as digits as its factorization.

15250948781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 15250948781 in words is "fifteen billion, two hundred fifty million, nine hundred forty-eight thousand, seven hundred eighty-one".