25355431103 has 2 divisors, whose sum is σ = 25355431104. Its totient is φ = 25355431102.

The previous prime is 25355431097. The next prime is 25355431117. The reversal of 25355431103 is 30113455352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25355431103 - 2³² = 21060463807 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25355431103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25355431183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12677715551 + 12677715552.

It is an arithmetic number, because the mean of its divisors is an integer number (12677715552).

Almost surely, 2^25355431103 is an apocalyptic number.

25355431103 is a deficient number, since it is larger than the sum of its proper divisors (1).

25355431103 is an equidigital number, since it uses as much as digits as its factorization.

25355431103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 25355431103 its reverse (30113455352), we get a palindrome (55468886455).

The spelling of 25355431103 in words is "twenty-five billion, three hundred fifty-five million, four hundred thirty-one thousand, one hundred three".