25206560213 has 4 divisors (see below), whose sum is σ = 25210993548. Its totient is φ = 25202126880.

The previous prime is 25206560207. The next prime is 25206560219. The reversal of 25206560213 is 31206560252.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25206560207) and next prime (25206560219).

It can be written as a sum of positive squares in 2 ways, for example, as 11940588529 + 13265971684 = 109273^2 + 115178^2 .

It is a cyclic number.

It is not a de Polignac number, because 25206560213 - 2¹² = 25206556117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25206560213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25206560219) 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, 2208128 + ... + 2219513.

It is an arithmetic number, because the mean of its divisors is an integer number (6302748387).

Almost surely, 2^25206560213 is an apocalyptic number.

It is an amenable number.

25206560213 is a deficient number, since it is larger than the sum of its proper divisors (4433335).

25206560213 is an equidigital number, since it uses as much as digits as its factorization.

25206560213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4433334.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 25206560213 in words is "twenty-five billion, two hundred six million, five hundred sixty thousand, two hundred thirteen".