131913856 has 32 divisors (see below), whose sum is σ = 264836880. Its totient is φ = 65445120.

The previous prime is 131913853. The next prime is 131913869. The reversal of 131913856 is 658319131.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (131913853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12835 + ... + 20701.

Almost surely, 2^131913856 is an apocalyptic number.

131913856 is a gapful number since it is divisible by the number (16) 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 131913856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132418440).

131913856 is an abundant number, since it is smaller than the sum of its proper divisors (132923024).

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

131913856 is an equidigital number, since it uses as much as digits as its factorization.

131913856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012 (or 8000 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 131913856 is about 11485.3757448331. The cubic root of 131913856 is about 509.0535516187.

The spelling of 131913856 in words is "one hundred thirty-one million, nine hundred thirteen thousand, eight hundred fifty-six".