131731650 has 48 divisors (see below), whose sum is σ = 362997600. Its totient is φ = 35128080.

The previous prime is 131731643. The next prime is 131731669. The reversal of 131731650 is 56137131.

131731650 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 3 + 1 + 650 = 666.

131731650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×131731650² = 34706455223445000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47440 + ... + 50139.

It is an arithmetic number, because the mean of its divisors is an integer number (7562450).

Almost surely, 2^131731650 is an apocalyptic number.

131731650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131731650 is an abundant number, since it is smaller than the sum of its proper divisors (231265950).

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

131731650 is a wasteful number, since it uses less digits than its factorization.

131731650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97600 (or 97589 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 131731650 is about 11477.4409168595. The cubic root of 131731650 is about 508.8190669030.

Adding to 131731650 its reverse (56137131), we get a palindrome (187868781).

The spelling of 131731650 in words is "one hundred thirty-one million, seven hundred thirty-one thousand, six hundred fifty".