131122636 has 24 divisors (see below), whose sum is σ = 234420480. Its totient is φ = 64152192.

The previous prime is 131122631. The next prime is 131122639. The reversal of 131122636 is 636221131.

It is a self number, because there is not a number n which added to its sum of digits gives 131122636.

It is not an unprimeable number, because it can be changed into a prime (131122631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120085 + ... + 121171.

It is an arithmetic number, because the mean of its divisors is an integer number (9767520).

Almost surely, 2^131122636 is an apocalyptic number.

It is an amenable number.

131122636 is a deficient number, since it is larger than the sum of its proper divisors (103297844).

131122636 is a wasteful number, since it uses less digits than its factorization.

131122636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1711 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 131122636 is about 11450.8792675497. The cubic root of 131122636 is about 508.0337413263.

Adding to 131122636 its reverse (636221131), we get a palindrome (767343767).

The spelling of 131122636 in words is "one hundred thirty-one million, one hundred twenty-two thousand, six hundred thirty-six".