131005442 has 12 divisors (see below), whose sum is σ = 203054598. Its totient is φ = 63388800.

The previous prime is 131005439. The next prime is 131005471. The reversal of 131005442 is 244500131.

It can be written as a sum of positive squares in only one way, i.e., 92948881 + 38056561 = 9641^2 + 6169^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32159 + ... + 36002.

Almost surely, 2^131005442 is an apocalyptic number.

131005442 is a deficient number, since it is larger than the sum of its proper divisors (72049156).

131005442 is an equidigital number, since it uses as much as digits as its factorization.

131005442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68225 (or 68194 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 131005442 is about 11445.7608746645. The cubic root of 131005442 is about 507.8823404320.

Adding to 131005442 its reverse (244500131), we get a palindrome (375505573).

The spelling of 131005442 in words is "one hundred thirty-one million, five thousand, four hundred forty-two".