25503163 has 8 divisors (see below), whose sum is σ = 29640960. Its totient is φ = 21489000.

The previous prime is 25503157. The next prime is 25503167. The reversal of 25503163 is 36130552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25503163 - 2⁵ = 25503131 is a prime.

It is a super-2 number, since 2×25503163² = 1300822646009138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25503167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30463 + ... + 31288.

It is an arithmetic number, because the mean of its divisors is an integer number (3705120).

Almost surely, 2^25503163 is an apocalyptic number.

25503163 is a deficient number, since it is larger than the sum of its proper divisors (4137797).

25503163 is an equidigital number, since it uses as much as digits as its factorization.

25503163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61817.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 25503163 is about 5050.0656431377. The cubic root of 25503163 is about 294.3504351702.

The spelling of 25503163 in words is "twenty-five million, five hundred three thousand, one hundred sixty-three".