131897856 has 80 divisors (see below), whose sum is σ = 359735904. Its totient is φ = 42921984.

The previous prime is 131897851. The next prime is 131897881. The reversal of 131897856 is 658798131.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (131897851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65050 + ... + 67046.

Almost surely, 2^131897856 is an apocalyptic number.

131897856 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 131897856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179867952).

131897856 is an abundant number, since it is smaller than the sum of its proper divisors (227838048).

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

131897856 is an equidigital number, since it uses as much as digits as its factorization.

131897856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2045 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 131897856 is about 11484.6791857674. The cubic root of 131897856 is about 509.0329695348.

The spelling of 131897856 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, eight hundred fifty-six".