25515116 has 24 divisors (see below), whose sum is σ = 48840960. Its totient is φ = 11566800.

The previous prime is 25515109. The next prime is 25515121. The reversal of 25515116 is 61151552.

It is a super-2 number, since 2×25515116² = 1302042288986912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27305 + ... + 28223.

It is an arithmetic number, because the mean of its divisors is an integer number (2035040).

Almost surely, 2^25515116 is an apocalyptic number.

It is an amenable number.

25515116 is a deficient number, since it is larger than the sum of its proper divisors (23325844).

25515116 is a wasteful number, since it uses less digits than its factorization.

25515116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565 (or 1563 counting only the distinct ones).

The product of its digits is 1500, while the sum is 26.

The square root of 25515116 is about 5051.2489544666. The cubic root of 25515116 is about 294.3964140582.

Adding to 25515116 its reverse (61151552), we get a palindrome (86666668).

It can be divided in two parts, 2551 and 5116, that added together give a palindrome (7667).

The spelling of 25515116 in words is "twenty-five million, five hundred fifteen thousand, one hundred sixteen".