131225540 has 12 divisors (see below), whose sum is σ = 275573676. Its totient is φ = 52490208.

The previous prime is 131225539. The next prime is 131225581. The reversal of 131225540 is 45522131.

131225540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 82337476 + 48888064 = 9074^2 + 6992^2 .

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, 3280619 + ... + 3280658.

It is an arithmetic number, because the mean of its divisors is an integer number (22964473).

Almost surely, 2^131225540 is an apocalyptic number.

131225540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131225540 is an abundant number, since it is smaller than the sum of its proper divisors (144348136).

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

131225540 is a wasteful number, since it uses less digits than its factorization.

131225540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561286 (or 6561284 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 131225540 is about 11455.3716657296. The cubic root of 131225540 is about 508.1666068526.

Adding to 131225540 its reverse (45522131), we get a palindrome (176747671).

The spelling of 131225540 in words is "one hundred thirty-one million, two hundred twenty-five thousand, five hundred forty".