25170213 has 8 divisors (see below), whose sum is σ = 33886528. Its totient is φ = 16617024.

The previous prime is 25170199. The next prime is 25170221. The reversal of 25170213 is 31207152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25170213 - 2¹⁰ = 25169189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25170213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25170263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40420 + ... + 41037.

It is an arithmetic number, because the mean of its divisors is an integer number (4235816).

Almost surely, 2^25170213 is an apocalyptic number.

It is an amenable number.

25170213 is a deficient number, since it is larger than the sum of its proper divisors (8716315).

25170213 is a wasteful number, since it uses less digits than its factorization.

25170213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81563.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 25170213 is about 5016.9924257467. The cubic root of 25170213 is about 293.0638812050.

Adding to 25170213 its reverse (31207152), we get a palindrome (56377365).

The spelling of 25170213 in words is "twenty-five million, one hundred seventy thousand, two hundred thirteen".