131331730 has 16 divisors (see below), whose sum is σ = 239246784. Its totient is φ = 51899440.

The previous prime is 131331727. The next prime is 131331731. The reversal of 131331730 is 37133131.

It is not an unprimeable number, because it can be changed into a prime (131331731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78286 + ... + 79945.

It is an arithmetic number, because the mean of its divisors is an integer number (14952924).

Almost surely, 2^131331730 is an apocalyptic number.

131331730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131331730 is a deficient number, since it is larger than the sum of its proper divisors (107915054).

131331730 is a wasteful number, since it uses less digits than its factorization.

131331730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158321.

The product of its (nonzero) digits is 567, while the sum is 22.

The square root of 131331730 is about 11460.0056719009. The cubic root of 131331730 is about 508.3036423281.

Adding to 131331730 its reverse (37133131), we get a palindrome (168464861).

The spelling of 131331730 in words is "one hundred thirty-one million, three hundred thirty-one thousand, seven hundred thirty".