131422340 has 48 divisors (see below), whose sum is σ = 322140672. Its totient is φ = 44098176.

The previous prime is 131422301. The next prime is 131422363. The reversal of 131422340 is 43224131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3407 + ... + 16566.

It is an arithmetic number, because the mean of its divisors is an integer number (6711264).

Almost surely, 2^131422340 is an apocalyptic number.

131422340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131422340 is an abundant number, since it is smaller than the sum of its proper divisors (190718332).

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

131422340 is a wasteful number, since it uses less digits than its factorization.

131422340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20036 (or 20034 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131422340 is about 11463.9583041810. The cubic root of 131422340 is about 508.4205138181.

Adding to 131422340 its reverse (43224131), we get a palindrome (174646471).

The spelling of 131422340 in words is "one hundred thirty-one million, four hundred twenty-two thousand, three hundred forty".