131281008 has 20 divisors (see below), whose sum is σ = 339142728. Its totient is φ = 43760320.

The previous prime is 131280971. The next prime is 131281009. The reversal of 131281008 is 800182131.

It is a super-2 number, since 2×131281008² = 34469406122992128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131281009) 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, 1367463 + ... + 1367558.

Almost surely, 2^131281008 is an apocalyptic number.

It is an amenable number.

131281008 is an abundant number, since it is smaller than the sum of its proper divisors (207861720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131281008 is a wasteful number, since it uses less digits than its factorization.

131281008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735032 (or 2735026 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 131281008 is about 11457.7924575374. The cubic root of 131281008 is about 508.2381961047.

The spelling of 131281008 in words is "one hundred thirty-one million, two hundred eighty-one thousand, eight".