131878508 has 18 divisors (see below), whose sum is σ = 237203316. Its totient is φ = 64154448.

The previous prime is 131878507. The next prime is 131878517. The reversal of 131878508 is 805878131.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (131878501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6566 + ... + 17517.

It is an arithmetic number, because the mean of its divisors is an integer number (13177962).

Almost surely, 2^131878508 is an apocalyptic number.

It is an amenable number.

131878508 is a deficient number, since it is larger than the sum of its proper divisors (105324808).

131878508 is a wasteful number, since it uses less digits than its factorization.

131878508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24161 (or 24122 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 131878508 is about 11483.8368152809. The cubic root of 131878508 is about 509.0080784264.

The spelling of 131878508 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, five hundred eight".