25215213 has 8 divisors (see below), whose sum is σ = 33998400. Its totient is φ = 16621088.

The previous prime is 25215187. The next prime is 25215221. The reversal of 25215213 is 31251252.

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

It is a cyclic number.

It is not a de Polignac number, because 25215213 - 2¹⁷ = 25084141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25215213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46953 + ... + 47486.

It is an arithmetic number, because the mean of its divisors is an integer number (4249800).

Almost surely, 2^25215213 is an apocalyptic number.

It is an amenable number.

25215213 is a deficient number, since it is larger than the sum of its proper divisors (8783187).

25215213 is an equidigital number, since it uses as much as digits as its factorization.

25215213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94531.

The product of its digits is 600, while the sum is 21.

The square root of 25215213 is about 5021.4751816573. The cubic root of 25215213 is about 293.2384264533.

Adding to 25215213 its reverse (31251252), we get a palindrome (56466465).

The spelling of 25215213 in words is "twenty-five million, two hundred fifteen thousand, two hundred thirteen".