131215144 has 16 divisors (see below), whose sum is σ = 246153600. Its totient is φ = 65574192.

The previous prime is 131215141. The next prime is 131215153. The reversal of 131215144 is 441512131.

It is not an unprimeable number, because it can be changed into a prime (131215141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22747 + ... + 27925.

It is an arithmetic number, because the mean of its divisors is an integer number (15384600).

Almost surely, 2^131215144 is an apocalyptic number.

It is an amenable number.

131215144 is a deficient number, since it is larger than the sum of its proper divisors (114938456).

131215144 is a wasteful number, since it uses less digits than its factorization.

131215144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8352 (or 8348 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 131215144 is about 11454.9178958210. The cubic root of 131215144 is about 508.1531871083.

Adding to 131215144 its reverse (441512131), we get a palindrome (572727275).

The spelling of 131215144 in words is "one hundred thirty-one million, two hundred fifteen thousand, one hundred forty-four".