25135816 has 16 divisors (see below), whose sum is σ = 47208240. Its totient is φ = 12546960.

The previous prime is 25135813. The next prime is 25135861. The reversal of 25135816 is 61853152.

It is not an unprimeable number, because it can be changed into a prime (25135813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3255 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (2950515).

Almost surely, 2^25135816 is an apocalyptic number.

It is an amenable number.

25135816 is a deficient number, since it is larger than the sum of its proper divisors (22072424).

25135816 is a wasteful number, since it uses less digits than its factorization.

25135816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244 (or 5240 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 25135816 is about 5013.5632039499. The cubic root of 25135816 is about 292.9303223599.

Adding to 25135816 its reverse (61853152), we get a palindrome (86988968).

The spelling of 25135816 in words is "twenty-five million, one hundred thirty-five thousand, eight hundred sixteen".