25380015 has 16 divisors (see below), whose sum is σ = 41181696. Its totient is φ = 13344800.

The previous prime is 25380011. The next prime is 25380059. The reversal of 25380015 is 51008352.

It is not a de Polignac number, because 25380015 - 2² = 25380011 is a prime.

It is a super-2 number, since 2×25380015² = 1288290322800450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25380011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10851 + ... + 12980.

It is an arithmetic number, because the mean of its divisors is an integer number (2573856).

Almost surely, 2^25380015 is an apocalyptic number.

25380015 is a deficient number, since it is larger than the sum of its proper divisors (15801681).

25380015 is a wasteful number, since it uses less digits than its factorization.

25380015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23910.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 25380015 is about 5037.8581758521. The cubic root of 25380015 is about 293.8758905098.

Adding to 25380015 its reverse (51008352), we get a palindrome (76388367).

The spelling of 25380015 in words is "twenty-five million, three hundred eighty thousand, fifteen".