15551325247 has 2 divisors, whose sum is σ = 15551325248. Its totient is φ = 15551325246.

The previous prime is 15551325151. The next prime is 15551325329. The reversal of 15551325247 is 74252315551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15551325247 - 2¹⁵ = 15551292479 is a prime.

It is a super-2 number, since 2×15551325247² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15558325247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775662623 + 7775662624.

It is an arithmetic number, because the mean of its divisors is an integer number (7775662624).

Almost surely, 2^15551325247 is an apocalyptic number.

15551325247 is a deficient number, since it is larger than the sum of its proper divisors (1).

15551325247 is an equidigital number, since it uses as much as digits as its factorization.

15551325247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210000, while the sum is 40.

The spelling of 15551325247 in words is "fifteen billion, five hundred fifty-one million, three hundred twenty-five thousand, two hundred forty-seven".