25406216 has 32 divisors (see below), whose sum is σ = 52164000. Its totient is φ = 11504640.

The previous prime is 25406189. The next prime is 25406219. The reversal of 25406216 is 61260452.

It is a super-2 number, since 2×25406216² = 1290951622877312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25406219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39191 + ... + 39833.

It is an arithmetic number, because the mean of its divisors is an integer number (1630125).

Almost surely, 2^25406216 is an apocalyptic number.

It is an amenable number.

25406216 is an abundant number, since it is smaller than the sum of its proper divisors (26757784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25406216 is a wasteful number, since it uses less digits than its factorization.

25406216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 25406216 is about 5040.4579157057. The cubic root of 25406216 is about 293.9769830963.

Adding to 25406216 its reverse (61260452), we get a palindrome (86666668).

The spelling of 25406216 in words is "twenty-five million, four hundred six thousand, two hundred sixteen".