131445562 has 4 divisors (see below), whose sum is σ = 197168346. Its totient is φ = 65722780.

The previous prime is 131445473. The next prime is 131445563. The reversal of 131445562 is 265544131.

It is a happy number.

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., 130896481 + 549081 = 11441^2 + 741^2 .

It is not an unprimeable number, because it can be changed into a prime (131445563) 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 as a sum of consecutive naturals, namely, 32861389 + ... + 32861392.

Almost surely, 2^131445562 is an apocalyptic number.

131445562 is a deficient number, since it is larger than the sum of its proper divisors (65722784).

131445562 is an equidigital number, since it uses as much as digits as its factorization.

131445562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65722783.

The product of its digits is 14400, while the sum is 31.

The square root of 131445562 is about 11464.9710858772. The cubic root of 131445562 is about 508.4504576005.

Adding to 131445562 its reverse (265544131), we get a palindrome (396989693).

The spelling of 131445562 in words is "one hundred thirty-one million, four hundred forty-five thousand, five hundred sixty-two".