25515016 has 8 divisors (see below), whose sum is σ = 47840670. Its totient is φ = 12757504.

The previous prime is 25514989. The next prime is 25515029. The reversal of 25515016 is 61051552.

It can be written as a sum of positive squares in only one way, i.e., 25462116 + 52900 = 5046^2 + 230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594681 + ... + 1594696.

Almost surely, 2^25515016 is an apocalyptic number.

It is an amenable number.

25515016 is a deficient number, since it is larger than the sum of its proper divisors (22325654).

25515016 is a wasteful number, since it uses less digits than its factorization.

25515016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189383 (or 3189379 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 25515016 is about 5051.2390559149. The cubic root of 25515016 is about 294.3960294538.

Adding to 25515016 its reverse (61051552), we get a palindrome (86566568).

The spelling of 25515016 in words is "twenty-five million, five hundred fifteen thousand, sixteen".