25551340 has 48 divisors (see below), whose sum is σ = 57238272. Its totient is φ = 9547776.

The previous prime is 25551329. The next prime is 25551343. The reversal of 25551340 is 4315552.

It is not an unprimeable number, because it can be changed into a prime (25551343) 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 15 ways as a sum of consecutive naturals, for example, 75652 + ... + 75988.

It is an arithmetic number, because the mean of its divisors is an integer number (1192464).

Almost surely, 2^25551340 is an apocalyptic number.

25551340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25551340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28619136).

25551340 is an abundant number, since it is smaller than the sum of its proper divisors (31686932).

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

25551340 is a wasteful number, since it uses less digits than its factorization.

25551340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25551340 is about 5054.8333305857. The cubic root of 25551340 is about 294.5356671058.

Adding to 25551340 its reverse (4315552), we get a palindrome (29866892).

The spelling of 25551340 in words is "twenty-five million, five hundred fifty-one thousand, three hundred forty".