131223432 has 32 divisors (see below), whose sum is σ = 329626080. Its totient is φ = 43532160.

The previous prime is 131223427. The next prime is 131223439. The reversal of 131223432 is 234322131.

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 = 131223399 and 131223408.

It is not an unprimeable number, because it can be changed into a prime (131223439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7893 + ... + 18020.

It is an arithmetic number, because the mean of its divisors is an integer number (10300815).

Almost surely, 2^131223432 is an apocalyptic number.

131223432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131223432 is an abundant number, since it is smaller than the sum of its proper divisors (198402648).

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

131223432 is a wasteful number, since it uses less digits than its factorization.

131223432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26133 (or 26129 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 131223432 is about 11455.2796561236. The cubic root of 131223432 is about 508.1638857844.

Adding to 131223432 its reverse (234322131), we get a palindrome (365545563).

The spelling of 131223432 in words is "one hundred thirty-one million, two hundred twenty-three thousand, four hundred thirty-two".