131333720 has 96 divisors (see below), whose sum is σ = 353231280. Its totient is φ = 43787520.

The previous prime is 131333717. The next prime is 131333729. The reversal of 131333720 is 27333131.

It is a happy number.

131333720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131333729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71615 + ... + 73425.

Almost surely, 2^131333720 is an apocalyptic number.

131333720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131333720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176615640).

131333720 is an abundant number, since it is smaller than the sum of its proper divisors (221897560).

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

131333720 is a wasteful number, since it uses less digits than its factorization.

131333720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1862 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 131333720 is about 11460.0924952637. The cubic root of 131333720 is about 508.3062096669.

Adding to 131333720 its reverse (27333131), we get a palindrome (158666851).

The spelling of 131333720 in words is "one hundred thirty-one million, three hundred thirty-three thousand, seven hundred twenty".