130731906 has 32 divisors (see below), whose sum is σ = 266643648. Its totient is φ = 42719040.

The previous prime is 130731901. The next prime is 130731907. The reversal of 130731906 is 609137031.

130731906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (130731901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199876 + ... + 200528.

It is an arithmetic number, because the mean of its divisors is an integer number (8332614).

Almost surely, 2^130731906 is an apocalyptic number.

130731906 is an abundant number, since it is smaller than the sum of its proper divisors (135911742).

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

130731906 is a wasteful number, since it uses less digits than its factorization.

130731906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 130731906 is about 11433.8054032767. The cubic root of 130731906 is about 507.5286123627.

Adding to 130731906 its reverse (609137031), we get a palindrome (739868937).

The spelling of 130731906 in words is "one hundred thirty million, seven hundred thirty-one thousand, nine hundred six".