131297216 has 56 divisors (see below), whose sum is σ = 267279120. Its totient is φ = 63977472.

The previous prime is 131297213. The next prime is 131297233. The reversal of 131297216 is 612792131.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131297213) 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, 733415 + ... + 733593.

Almost surely, 2^131297216 is an apocalyptic number.

131297216 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 131297216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133639560).

131297216 is an abundant number, since it is smaller than the sum of its proper divisors (135981904).

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

131297216 is a wasteful number, since it uses less digits than its factorization.

131297216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 411 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 131297216 is about 11458.4997272767. The cubic root of 131297216 is about 508.2591110003.

The spelling of 131297216 in words is "one hundred thirty-one million, two hundred ninety-seven thousand, two hundred sixteen".