131315668 has 12 divisors (see below), whose sum is σ = 250693632. Its totient is φ = 59688920.

The previous prime is 131315573. The next prime is 131315677. The reversal of 131315668 is 866513131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1492180 + ... + 1492267.

It is an arithmetic number, because the mean of its divisors is an integer number (20891136).

Almost surely, 2^131315668 is an apocalyptic number.

It is an amenable number.

131315668 is a deficient number, since it is larger than the sum of its proper divisors (119377964).

131315668 is a wasteful number, since it uses less digits than its factorization.

131315668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984462 (or 2984460 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 131315668 is about 11459.3048654794. The cubic root of 131315668 is about 508.2829194711.

Adding to 131315668 its reverse (866513131), we get a palindrome (997828799).

The spelling of 131315668 in words is "one hundred thirty-one million, three hundred fifteen thousand, six hundred sixty-eight".