15241490857 has 2 divisors, whose sum is σ = 15241490858. Its totient is φ = 15241490856.

The previous prime is 15241490837. The next prime is 15241490863. The reversal of 15241490857 is 75809414251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14405760576 + 835730281 = 120024^2 + 28909^2 .

It is a cyclic number.

It is not a de Polignac number, because 15241490857 - 2⁷ = 15241490729 is a prime.

It is not a weakly prime, because it can be changed into another prime (15241490837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620745428 + 7620745429.

It is an arithmetic number, because the mean of its divisors is an integer number (7620745429).

Almost surely, 2^15241490857 is an apocalyptic number.

It is an amenable number.

15241490857 is a deficient number, since it is larger than the sum of its proper divisors (1).

15241490857 is an equidigital number, since it uses as much as digits as its factorization.

15241490857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 15241490857 in words is "fifteen billion, two hundred forty-one million, four hundred ninety thousand, eight hundred fifty-seven".