216131760 has 320 divisors, whose sum is σ = 824947200. Its totient is φ = 51674112.

The previous prime is 216131753. The next prime is 216131767. The reversal of 216131760 is 67131612.

It is an interprime number because it is at equal distance from previous prime (216131753) and next prime (216131767).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216131767) 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 63 ways as a sum of consecutive naturals, for example, 1207351 + ... + 1207529.

It is an arithmetic number, because the mean of its divisors is an integer number (2577960).

Almost surely, 2^216131760 is an apocalyptic number.

216131760 is a gapful number since it is divisible by the number (20) 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 216131760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412473600).

216131760 is an abundant number, since it is smaller than the sum of its proper divisors (608815440).

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

216131760 is a wasteful number, since it uses less digits than its factorization.

216131760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 216131760 is about 14701.4203395454. The cubic root of 216131760 is about 600.1219752017.

The spelling of 216131760 in words is "two hundred sixteen million, one hundred thirty-one thousand, seven hundred sixty".