25543340 has 24 divisors (see below), whose sum is σ = 55974240. Its totient is φ = 9772928.

The previous prime is 25543339. The next prime is 25543351. The reversal of 25543340 is 4334552.

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 + ... + 28224.

It is an arithmetic number, because the mean of its divisors is an integer number (2332260).

Almost surely, 2^25543340 is an apocalyptic number.

25543340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25543340 is an abundant number, since it is smaller than the sum of its proper divisors (30430900).

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

25543340 is a wasteful number, since it uses less digits than its factorization.

25543340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55561 (or 55559 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 25543340 is about 5054.0419467986. The cubic root of 25543340 is about 294.5049246700.

Adding to 25543340 its reverse (4334552), we get a palindrome (29877892).

The spelling of 25543340 in words is "twenty-five million, five hundred forty-three thousand, three hundred forty".