131434540 has 24 divisors (see below), whose sum is σ = 276896592. Its totient is φ = 52405440.

The previous prime is 131434517. The next prime is 131434543. The reversal of 131434540 is 45434131.

131434540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (131434543) 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 7 ways as a sum of consecutive naturals, for example, 4026 + ... + 16705.

It is an arithmetic number, because the mean of its divisors is an integer number (11537358).

Almost surely, 2^131434540 is an apocalyptic number.

131434540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131434540 is an abundant number, since it is smaller than the sum of its proper divisors (145462052).

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

131434540 is a wasteful number, since it uses less digits than its factorization.

131434540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21057 (or 21055 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 131434540 is about 11464.4903942565. The cubic root of 131434540 is about 508.4362456395.

Adding to 131434540 its reverse (45434131), we get a palindrome (176868671).

The spelling of 131434540 in words is "one hundred thirty-one million, four hundred thirty-four thousand, five hundred forty".