25211304520423 has 32 divisors (see below), whose sum is σ = 30395391206400. Its totient is φ = 20444118114816.

The previous prime is 25211304520379. The next prime is 25211304520447. The reversal of 25211304520423 is 32402540311252.

It is a cyclic number.

It is not a de Polignac number, because 25211304520423 - 2²¹ = 25211302423271 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 (25211304520463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8604223 + ... + 11155951.

It is an arithmetic number, because the mean of its divisors is an integer number (949855975200).

Almost surely, 2^{25211304520423} is an apocalyptic number.

25211304520423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25211304520423 is a deficient number, since it is larger than the sum of its proper divisors (5184086685977).

25211304520423 is a wasteful number, since it uses less digits than its factorization.

25211304520423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552431.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 25211304520423 its reverse (32402540311252), we get a palindrome (57613844831675).

The spelling of 25211304520423 in words is "twenty-five trillion, two hundred eleven billion, three hundred four million, five hundred twenty thousand, four hundred twenty-three".