25223663527 has 4 divisors (see below), whose sum is σ = 25270288216. Its totient is φ = 25177038840.

The previous prime is 25223663473. The next prime is 25223663567. The reversal of 25223663527 is 72536632252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25223663527 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 (25223663567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23311533 + ... + 23312614.

It is an arithmetic number, because the mean of its divisors is an integer number (6317572054).

Almost surely, 2^25223663527 is an apocalyptic number.

25223663527 is a deficient number, since it is larger than the sum of its proper divisors (46624689).

25223663527 is an equidigital number, since it uses as much as digits as its factorization.

25223663527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46624688.

The product of its digits is 907200, while the sum is 43.

The spelling of 25223663527 in words is "twenty-five billion, two hundred twenty-three million, six hundred sixty-three thousand, five hundred twenty-seven".