25201256403 has 4 divisors (see below), whose sum is σ = 33601675208. Its totient is φ = 16800837600.

The previous prime is 25201256341. The next prime is 25201256413. The reversal of 25201256403 is 30465210252.

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

It is not a de Polignac number, because 25201256403 - 2¹⁴ = 25201240019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25201256413) 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, 4200209398 + ... + 4200209403.

It is an arithmetic number, because the mean of its divisors is an integer number (8400418802).

Almost surely, 2^25201256403 is an apocalyptic number.

25201256403 is a deficient number, since it is larger than the sum of its proper divisors (8400418805).

25201256403 is an equidigital number, since it uses as much as digits as its factorization.

25201256403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400418804.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 25201256403 its reverse (30465210252), we get a palindrome (55666466655).

The spelling of 25201256403 in words is "twenty-five billion, two hundred one million, two hundred fifty-six thousand, four hundred three".