25221263 has 4 divisors (see below), whose sum is σ = 25807848. Its totient is φ = 24634680.

The previous prime is 25221253. The next prime is 25221277. The reversal of 25221263 is 36212252.

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 25221263 - 2⁶ = 25221199 is a prime.

It is a super-2 number, since 2×25221263² = 1272224214630338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221223) 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, 293228 + ... + 293313.

It is an arithmetic number, because the mean of its divisors is an integer number (6451962).

Almost surely, 2^25221263 is an apocalyptic number.

25221263 is a deficient number, since it is larger than the sum of its proper divisors (586585).

25221263 is an equidigital number, since it uses as much as digits as its factorization.

25221263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586584.

The product of its digits is 1440, while the sum is 23.

The square root of 25221263 is about 5022.0775581426. The cubic root of 25221263 is about 293.2618772515.

The spelling of 25221263 in words is "twenty-five million, two hundred twenty-one thousand, two hundred sixty-three".