25635213 has 12 divisors (see below), whose sum is σ = 37138140. Its totient is φ = 17039616.

The previous prime is 25635151. The next prime is 25635221. The reversal of 25635213 is 31253652.

25635213 is a `hidden beast` number, since 2 + 5 + 635 + 21 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3337929 + 22297284 = 1827^2 + 4722^2 .

It is not a de Polignac number, because 25635213 - 2⁶ = 25635149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25635223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 858 + ... + 7211.

It is an arithmetic number, because the mean of its divisors is an integer number (3094845).

Almost surely, 2^25635213 is an apocalyptic number.

It is an amenable number.

25635213 is a deficient number, since it is larger than the sum of its proper divisors (11502927).

25635213 is a wasteful number, since it uses less digits than its factorization.

25635213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8428 (or 8425 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 25635213 is about 5063.1228505735. The cubic root of 25635213 is about 294.8575890235.

Adding to 25635213 its reverse (31253652), we get a palindrome (56888865).

It can be divided in two parts, 2563 and 5213, that added together give a 5-th power (7776 = 6⁵).

The spelling of 25635213 in words is "twenty-five million, six hundred thirty-five thousand, two hundred thirteen".