25564263 has 8 divisors (see below), whose sum is σ = 34117488. Its totient is φ = 17026944.

The previous prime is 25564261. The next prime is 25564303. The reversal of 25564263 is 36246552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25564263 - 2¹ = 25564261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25564261) 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 7 ways as a sum of consecutive naturals, for example, 495 + ... + 7167.

It is an arithmetic number, because the mean of its divisors is an integer number (4264686).

Almost surely, 2^25564263 is an apocalyptic number.

25564263 is a deficient number, since it is larger than the sum of its proper divisors (8553225).

25564263 is a wasteful number, since it uses less digits than its factorization.

25564263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7953.

The product of its digits is 43200, while the sum is 33.

The square root of 25564263 is about 5056.1114505121. Note that the first 3 decimals coincide. The cubic root of 25564263 is about 294.5853141160.

The spelling of 25564263 in words is "twenty-five million, five hundred sixty-four thousand, two hundred sixty-three".