131445234 has 32 divisors (see below), whose sum is σ = 292481280. Its totient is φ = 43758000.

The previous prime is 131445233. The next prime is 131445263. The reversal of 131445234 is 432544131.

It is a happy number.

131445234 is a `hidden beast` number, since 131 + 4 + 4 + 523 + 4 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131445198 and 131445207.

It is not an unprimeable number, because it can be changed into a prime (131445233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69319 + ... + 71189.

It is an arithmetic number, because the mean of its divisors is an integer number (9140040).

Almost surely, 2^131445234 is an apocalyptic number.

131445234 is an abundant number, since it is smaller than the sum of its proper divisors (161036046).

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

131445234 is a wasteful number, since it uses less digits than its factorization.

131445234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183 (or 3177 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 131445234 is about 11464.9567814275. The cubic root of 131445234 is about 508.4500346830.

Adding to 131445234 its reverse (432544131), we get a palindrome (563989365).

The spelling of 131445234 in words is "one hundred thirty-one million, four hundred forty-five thousand, two hundred thirty-four".