25211240 has 16 divisors (see below), whose sum is σ = 56725380. Its totient is φ = 10084480.

The previous prime is 25211227. The next prime is 25211261. The reversal of 25211240 is 4211252.

It can be written as a sum of positive squares in 2 ways, for example, as 24542116 + 669124 = 4954^2 + 818^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315101 + ... + 315180.

Almost surely, 2^25211240 is an apocalyptic number.

25211240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25211240 is an abundant number, since it is smaller than the sum of its proper divisors (31514140).

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

25211240 is a wasteful number, since it uses less digits than its factorization.

25211240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630292 (or 630288 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 25211240 is about 5021.0795651931. The cubic root of 25211240 is about 293.2230244093.

Adding to 25211240 its reverse (4211252), we get a palindrome (29422492).

The spelling of 25211240 in words is "twenty-five million, two hundred eleven thousand, two hundred forty".