131322442 has 4 divisors (see below), whose sum is σ = 196983666. Its totient is φ = 65661220.

The previous prime is 131322431. The next prime is 131322449. The reversal of 131322442 is 244223131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 121903681 + 9418761 = 11041^2 + 3069^2 .

It is not an unprimeable number, because it can be changed into a prime (131322449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32830609 + ... + 32830612.

Almost surely, 2^131322442 is an apocalyptic number.

131322442 is a deficient number, since it is larger than the sum of its proper divisors (65661224).

131322442 is an equidigital number, since it uses as much as digits as its factorization.

131322442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65661223.

The product of its digits is 1152, while the sum is 22.

The square root of 131322442 is about 11459.6004293343. The cubic root of 131322442 is about 508.2916593505.

Adding to 131322442 its reverse (244223131), we get a palindrome (375545573).

The spelling of 131322442 in words is "one hundred thirty-one million, three hundred twenty-two thousand, four hundred forty-two".