131315144 has 8 divisors (see below), whose sum is σ = 246215910. Its totient is φ = 65657568.

The previous prime is 131315117. The next prime is 131315159. The reversal of 131315144 is 441513131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 2220100 = 11362^2 + 1490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8207189 + ... + 8207204.

Almost surely, 2^131315144 is an apocalyptic number.

It is an amenable number.

131315144 is a deficient number, since it is larger than the sum of its proper divisors (114900766).

131315144 is a wasteful number, since it uses less digits than its factorization.

131315144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16414399 (or 16414395 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 131315144 is about 11459.2820019406. The cubic root of 131315144 is about 508.2822433888.

Adding to 131315144 its reverse (441513131), we get a palindrome (572828275).

The spelling of 131315144 in words is "one hundred thirty-one million, three hundred fifteen thousand, one hundred forty-four".