25540016 has 10 divisors (see below), whose sum is σ = 49483812. Its totient is φ = 12770000.

The previous prime is 25539991. The next prime is 25540019. The reversal of 25540016 is 61004552.

It is a junction number, because it is equal to n+sod(n) for n = 25539973 and 25540000.

It is not an unprimeable number, because it can be changed into a prime (25540019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798110 + ... + 798141.

Almost surely, 2^25540016 is an apocalyptic number.

It is an amenable number.

25540016 is a deficient number, since it is larger than the sum of its proper divisors (23943796).

25540016 is a wasteful number, since it uses less digits than its factorization.

25540016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596259 (or 1596253 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25540016 is about 5053.7130903921. The cubic root of 25540016 is about 294.4921493003.

Adding to 25540016 its reverse (61004552), we get a palindrome (86544568).

The spelling of 25540016 in words is "twenty-five million, five hundred forty thousand, sixteen".