131318522 has 4 divisors (see below), whose sum is σ = 196977786. Its totient is φ = 65659260.

The previous prime is 131318491. The next prime is 131318527. The reversal of 131318522 is 225813131.

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., 77457601 + 53860921 = 8801^2 + 7339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131318491 and 131318500.

It is not an unprimeable number, because it can be changed into a prime (131318527) 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, 32829629 + ... + 32829632.

Almost surely, 2^131318522 is an apocalyptic number.

131318522 is a deficient number, since it is larger than the sum of its proper divisors (65659264).

131318522 is an equidigital number, since it uses as much as digits as its factorization.

131318522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65659263.

The product of its digits is 1440, while the sum is 26.

The square root of 131318522 is about 11459.4293924261. The cubic root of 131318522 is about 508.2866017657.

The spelling of 131318522 in words is "one hundred thirty-one million, three hundred eighteen thousand, five hundred twenty-two".