131243424 has 96 divisors (see below), whose sum is σ = 374984064. Its totient is φ = 39951360.

The previous prime is 131243347. The next prime is 131243443. The reversal of 131243424 is 424342131.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 131243394 and 131243403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128034 + ... + 129054.

It is an arithmetic number, because the mean of its divisors is an integer number (3906084).

Almost surely, 2^131243424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131243424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187492032).

131243424 is an abundant number, since it is smaller than the sum of its proper divisors (243740640).

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

131243424 is a wasteful number, since it uses less digits than its factorization.

131243424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1142 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 131243424 is about 11456.1522336254. The cubic root of 131243424 is about 508.1896908721.

Adding to 131243424 its reverse (424342131), we get a palindrome (555585555).

The spelling of 131243424 in words is "one hundred thirty-one million, two hundred forty-three thousand, four hundred twenty-four".