25211663 has 4 divisors (see below), whose sum is σ = 26694720. Its totient is φ = 23728608.

The previous prime is 25211647. The next prime is 25211687. The reversal of 25211663 is 36611252.

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 25211663 - 2⁴ = 25211647 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 (25291663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741503 + ... + 741536.

It is an arithmetic number, because the mean of its divisors is an integer number (6673680).

Almost surely, 2^25211663 is an apocalyptic number.

25211663 is a deficient number, since it is larger than the sum of its proper divisors (1483057).

25211663 is a wasteful number, since it uses less digits than its factorization.

25211663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483056.

The product of its digits is 2160, while the sum is 26.

The square root of 25211663 is about 5021.1216874320. The cubic root of 25211663 is about 293.2246643213.

The spelling of 25211663 in words is "twenty-five million, two hundred eleven thousand, six hundred sixty-three".