131213522 has 16 divisors (see below), whose sum is σ = 218354400. Its totient is φ = 58631040.

The previous prime is 131213477. The next prime is 131213561. The reversal of 131213522 is 225312131.

It is a junction number, because it is equal to n+sod(n) for n = 131213494 and 131213503.

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 7 ways as a sum of consecutive naturals, for example, 49247 + ... + 51842.

It is an arithmetic number, because the mean of its divisors is an integer number (13647150).

Almost surely, 2^131213522 is an apocalyptic number.

131213522 is a deficient number, since it is larger than the sum of its proper divisors (87140878).

131213522 is a wasteful number, since it uses less digits than its factorization.

131213522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101161.

The product of its digits is 360, while the sum is 20.

The square root of 131213522 is about 11454.8470963169. The cubic root of 131213522 is about 508.1510932752.

Adding to 131213522 its reverse (225312131), we get a palindrome (356525653).

The spelling of 131213522 in words is "one hundred thirty-one million, two hundred thirteen thousand, five hundred twenty-two".