131106720 has 96 divisors (see below), whose sum is σ = 437306688. Its totient is φ = 32903168.

The previous prime is 131106697. The next prime is 131106721. The reversal of 131106720 is 27601131.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (131106721) 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, 127 + ... + 16193.

It is an arithmetic number, because the mean of its divisors is an integer number (4555278).

Almost surely, 2^131106720 is an apocalyptic number.

131106720 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 131106720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218653344).

131106720 is an abundant number, since it is smaller than the sum of its proper divisors (306199968).

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

131106720 is a wasteful number, since it uses less digits than its factorization.

131106720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16102 (or 16094 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 131106720 is about 11450.1842779931. The cubic root of 131106720 is about 508.0131850175.

Adding to 131106720 its reverse (27601131), we get a palindrome (158707851).

The spelling of 131106720 in words is "one hundred thirty-one million, one hundred six thousand, seven hundred twenty".