25813243 has 4 divisors (see below), whose sum is σ = 25824568. Its totient is φ = 25801920.

The previous prime is 25813223. The next prime is 25813261. The reversal of 25813243 is 34231852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25813243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25813223) 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, 918 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (6456142).

Almost surely, 2^25813243 is an apocalyptic number.

25813243 is a deficient number, since it is larger than the sum of its proper divisors (11325).

25813243 is an equidigital number, since it uses as much as digits as its factorization.

25813243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11324.

The product of its digits is 5760, while the sum is 28.

The square root of 25813243 is about 5080.6734789789. The cubic root of 25813243 is about 295.5385851892.

The spelling of 25813243 in words is "twenty-five million, eight hundred thirteen thousand, two hundred forty-three".