25116227551 has 2 divisors, whose sum is σ = 25116227552. Its totient is φ = 25116227550.

The previous prime is 25116227531. The next prime is 25116227561. The reversal of 25116227551 is 15572261152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25116227551 - 2¹¹ = 25116225503 is a prime.

It is a super-2 number, since 2×25116227551² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25116227551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25116227531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558113775 + 12558113776.

It is an arithmetic number, because the mean of its divisors is an integer number (12558113776).

Almost surely, 2^25116227551 is an apocalyptic number.

25116227551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25116227551 is an equidigital number, since it uses as much as digits as its factorization.

25116227551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 37.

The spelling of 25116227551 in words is "twenty-five billion, one hundred sixteen million, two hundred twenty-seven thousand, five hundred fifty-one".