25540212 has 96 divisors (see below), whose sum is σ = 66495744. Its totient is φ = 7603200.

The previous prime is 25540211. The next prime is 25540217. The reversal of 25540212 is 21204552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418662 + ... + 418722.

It is an arithmetic number, because the mean of its divisors is an integer number (692664).

Almost surely, 2^25540212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25540212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33247872).

25540212 is an abundant number, since it is smaller than the sum of its proper divisors (40955532).

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

25540212 is a wasteful number, since it uses less digits than its factorization.

25540212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25540212 is about 5053.7324820374. The cubic root of 25540212 is about 294.4929026320.

Adding to 25540212 its reverse (21204552), we get a palindrome (46744764).

It can be divided in two parts, 25540 and 212, that added together give a palindrome (25752).

The spelling of 25540212 in words is "twenty-five million, five hundred forty thousand, two hundred twelve".