25620163 has 4 divisors (see below), whose sum is σ = 25908120. Its totient is φ = 25332208.

The previous prime is 25620149. The next prime is 25620193. The reversal of 25620163 is 36102652.

25620163 is nontrivially palindromic in base 2.

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 25620163 - 2¹⁷ = 25489091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25620143) 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, 143845 + ... + 144022.

It is an arithmetic number, because the mean of its divisors is an integer number (6477030).

Almost surely, 2^25620163 is an apocalyptic number.

25620163 is a deficient number, since it is larger than the sum of its proper divisors (287957).

25620163 is an equidigital number, since it uses as much as digits as its factorization.

25620163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287956.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25620163 is about 5061.6363954753. The cubic root of 25620163 is about 294.7998757599.

The spelling of 25620163 in words is "twenty-five million, six hundred twenty thousand, one hundred sixty-three".