25780203 has 6 divisors (see below), whose sum is σ = 37238084. Its totient is φ = 17186796.

The previous prime is 25780201. The next prime is 25780229. The reversal of 25780203 is 30208752.

It is not a de Polignac number, because 25780203 - 2¹ = 25780201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25780201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1432225 + ... + 1432242.

Almost surely, 2^25780203 is an apocalyptic number.

25780203 is a deficient number, since it is larger than the sum of its proper divisors (11457881).

25780203 is a wasteful number, since it uses less digits than its factorization.

25780203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864473 (or 2864470 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 25780203 is about 5077.4209004178. The cubic root of 25780203 is about 295.4124385194.

Adding to 25780203 its reverse (30208752), we get a palindrome (55988955).

The spelling of 25780203 in words is "twenty-five million, seven hundred eighty thousand, two hundred three".