131142444 has 12 divisors (see below), whose sum is σ = 305999064. Its totient is φ = 43714144.

The previous prime is 131142439. The next prime is 131142457. The reversal of 131142444 is 444241131.

It is a tau number, because it is divible by the number of its divisors (12).

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

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 3 ways as a sum of consecutive naturals, for example, 5464257 + ... + 5464280.

It is an arithmetic number, because the mean of its divisors is an integer number (25499922).

Almost surely, 2^131142444 is an apocalyptic number.

It is an amenable number.

131142444 is an abundant number, since it is smaller than the sum of its proper divisors (174856620).

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

131142444 is a wasteful number, since it uses less digits than its factorization.

131142444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10928544 (or 10928542 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 131142444 is about 11451.7441466355. The cubic root of 131142444 is about 508.0593220244.

Adding to 131142444 its reverse (444241131), we get a palindrome (575383575).

The spelling of 131142444 in words is "one hundred thirty-one million, one hundred forty-two thousand, four hundred forty-four".