131118646 has 16 divisors (see below), whose sum is σ = 201692448. Its totient is φ = 63907200.

The previous prime is 131118643. The next prime is 131118649. The reversal of 131118646 is 646811131.

It is an interprime number because it is at equal distance from previous prime (131118643) and next prime (131118649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131118643) 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, 9031 + ... + 18541.

It is an arithmetic number, because the mean of its divisors is an integer number (12605778).

Almost surely, 2^131118646 is an apocalyptic number.

131118646 is a deficient number, since it is larger than the sum of its proper divisors (70573802).

131118646 is a wasteful number, since it uses less digits than its factorization.

131118646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9687.

The product of its digits is 3456, while the sum is 31.

The square root of 131118646 is about 11450.7050437953. The cubic root of 131118646 is about 508.0285881983.

Adding to 131118646 its reverse (646811131), we get a palindrome (777929777).

The spelling of 131118646 in words is "one hundred thirty-one million, one hundred eighteen thousand, six hundred forty-six".