131211716 has 24 divisors (see below), whose sum is σ = 237511680. Its totient is φ = 63360000.

The previous prime is 131211709. The next prime is 131211737. The reversal of 131211716 is 617112131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131211691 and 131211700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92420 + ... + 93828.

It is an arithmetic number, because the mean of its divisors is an integer number (9896320).

Almost surely, 2^131211716 is an apocalyptic number.

It is an amenable number.

131211716 is a deficient number, since it is larger than the sum of its proper divisors (106299964).

131211716 is a wasteful number, since it uses less digits than its factorization.

131211716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195 (or 2193 counting only the distinct ones).

The product of its digits is 252, while the sum is 23.

The square root of 131211716 is about 11454.7682647882. The cubic root of 131211716 is about 508.1487618968.

Adding to 131211716 its reverse (617112131), we get a palindrome (748323847).

The spelling of 131211716 in words is "one hundred thirty-one million, two hundred eleven thousand, seven hundred sixteen".