25415203103 has 4 divisors (see below), whose sum is σ = 25416180888. Its totient is φ = 25414225320.

The previous prime is 25415203081. The next prime is 25415203129. The reversal of 25415203103 is 30130251452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25415203103 - 2²⁰ = 25414154527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25415203903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448808 + ... + 502253.

It is an arithmetic number, because the mean of its divisors is an integer number (6354045222).

Almost surely, 2^25415203103 is an apocalyptic number.

25415203103 is a deficient number, since it is larger than the sum of its proper divisors (977785).

25415203103 is an equidigital number, since it uses as much as digits as its factorization.

25415203103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977784.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 25415203103 its reverse (30130251452), we get a palindrome (55545454555).

The spelling of 25415203103 in words is "twenty-five billion, four hundred fifteen million, two hundred three thousand, one hundred three".