25315315 has 8 divisors (see below), whose sum is σ = 31977360. Its totient is φ = 19186272.

The previous prime is 25315309. The next prime is 25315319. The reversal of 25315315 is 51351352.

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 25315315 - 2¹³ = 25307123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25315315.

It is not an unprimeable number, because it can be changed into a prime (25315319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133144 + ... + 133333.

It is an arithmetic number, because the mean of its divisors is an integer number (3997170).

Almost surely, 2^25315315 is an apocalyptic number.

25315315 is a deficient number, since it is larger than the sum of its proper divisors (6662045).

25315315 is a wasteful number, since it uses less digits than its factorization.

25315315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266501.

The product of its digits is 2250, while the sum is 25.

The square root of 25315315 is about 5031.4326985462. The cubic root of 25315315 is about 293.6259569829.

Adding to 25315315 its reverse (51351352), we get a palindrome (76666667).

The spelling of 25315315 in words is "twenty-five million, three hundred fifteen thousand, three hundred fifteen".