131213420 has 24 divisors (see below), whose sum is σ = 296744784. Its totient is φ = 48447936.

The previous prime is 131213417. The next prime is 131213441. The reversal of 131213420 is 24312131.

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 7 ways as a sum of consecutive naturals, for example, 252074 + ... + 252593.

It is an arithmetic number, because the mean of its divisors is an integer number (12364366).

Almost surely, 2^131213420 is an apocalyptic number.

131213420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131213420 is an abundant number, since it is smaller than the sum of its proper divisors (165531364).

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

131213420 is a wasteful number, since it uses less digits than its factorization.

131213420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504689 (or 504687 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131213420 is about 11454.8426440523. The cubic root of 131213420 is about 508.1509616032.

Adding to 131213420 its reverse (24312131), we get a palindrome (155525551).

The spelling of 131213420 in words is "one hundred thirty-one million, two hundred thirteen thousand, four hundred twenty".