25131380 has 24 divisors (see below), whose sum is σ = 53012232. Its totient is φ = 10007552.

The previous prime is 25131377. The next prime is 25131391. The reversal of 25131380 is 8313152.

It can be written as a sum of positive squares in 4 ways, for example, as 4682896 + 20448484 = 2164^2 + 4522^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1964 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (2208843).

Almost surely, 2^25131380 is an apocalyptic number.

25131380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25131380 is an abundant number, since it is smaller than the sum of its proper divisors (27880852).

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

25131380 is a wasteful number, since it uses less digits than its factorization.

25131380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635 (or 5633 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 25131380 is about 5013.1207845014. The cubic root of 25131380 is about 292.9130891104.

The spelling of 25131380 in words is "twenty-five million, one hundred thirty-one thousand, three hundred eighty".