25311140 has 12 divisors (see below), whose sum is σ = 53153436. Its totient is φ = 10124448.

The previous prime is 25311127. The next prime is 25311163. The reversal of 25311140 is 4111352.

It can be written as a sum of positive squares in 2 ways, for example, as 5721664 + 19589476 = 2392^2 + 4426^2 .

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 3 ways as a sum of consecutive naturals, for example, 632759 + ... + 632798.

It is an arithmetic number, because the mean of its divisors is an integer number (4429453).

Almost surely, 2^25311140 is an apocalyptic number.

25311140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25311140 is an abundant number, since it is smaller than the sum of its proper divisors (27842296).

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

25311140 is a wasteful number, since it uses less digits than its factorization.

25311140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265566 (or 1265564 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 25311140 is about 5031.0177896724. The cubic root of 25311140 is about 293.6098145046.

Adding to 25311140 its reverse (4111352), we get a palindrome (29422492).

The spelling of 25311140 in words is "twenty-five million, three hundred eleven thousand, one hundred forty".