25203155413 has 2 divisors, whose sum is σ = 25203155414. Its totient is φ = 25203155412.

The previous prime is 25203155407. The next prime is 25203155423. The reversal of 25203155413 is 31455130252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18233911089 + 6969244324 = 135033^2 + 83482^2 .

It is a cyclic number.

It is not a de Polignac number, because 25203155413 - 2²⁹ = 24666284501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25203155423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12601577706 + 12601577707.

It is an arithmetic number, because the mean of its divisors is an integer number (12601577707).

Almost surely, 2^25203155413 is an apocalyptic number.

It is an amenable number.

25203155413 is a deficient number, since it is larger than the sum of its proper divisors (1).

25203155413 is an equidigital number, since it uses as much as digits as its factorization.

25203155413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 25203155413 its reverse (31455130252), we get a palindrome (56658285665).

The spelling of 25203155413 in words is "twenty-five billion, two hundred three million, one hundred fifty-five thousand, four hundred thirteen".