131213744 has 20 divisors (see below), whose sum is σ = 254860920. Its totient is φ = 65443200.

The previous prime is 131213741. The next prime is 131213749. The reversal of 131213744 is 447312131.

It is a super-2 number, since 2×131213744² = 34434093228995072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131213741) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3482 + ... + 16569.

It is an arithmetic number, because the mean of its divisors is an integer number (12743046).

Almost surely, 2^131213744 is an apocalyptic number.

It is an amenable number.

131213744 is a deficient number, since it is larger than the sum of its proper divisors (123647176).

131213744 is a wasteful number, since it uses less digits than its factorization.

131213744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468 (or 20462 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 131213744 is about 11454.8567865338. The cubic root of 131213744 is about 508.1513798551.

Adding to 131213744 its reverse (447312131), we get a palindrome (578525875).

The spelling of 131213744 in words is "one hundred thirty-one million, two hundred thirteen thousand, seven hundred forty-four".