25563211 has 4 divisors (see below), whose sum is σ = 25726192. Its totient is φ = 25400232.

The previous prime is 25563193. The next prime is 25563217. The reversal of 25563211 is 11236552.

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 25563211 - 2²¹ = 23466059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25563217) 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, 81255 + ... + 81568.

It is an arithmetic number, because the mean of its divisors is an integer number (6431548).

Almost surely, 2^25563211 is an apocalyptic number.

25563211 is a deficient number, since it is larger than the sum of its proper divisors (162981).

25563211 is a wasteful number, since it uses less digits than its factorization.

25563211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162980.

The product of its digits is 1800, while the sum is 25.

The square root of 25563211 is about 5056.0074169249. The cubic root of 25563211 is about 294.5812732146.

Adding to 25563211 its reverse (11236552), we get a palindrome (36799763).

The spelling of 25563211 in words is "twenty-five million, five hundred sixty-three thousand, two hundred eleven".