216730131 has 8 divisors (see below), whose sum is σ = 304182720. Its totient is φ = 136882152.

The previous prime is 216730123. The next prime is 216730153. The reversal of 216730131 is 131037612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216730131 - 2³ = 216730123 is a prime.

It is a super-2 number, since 2×216730131² = 93943899366554322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216730121) 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 7 ways as a sum of consecutive naturals, for example, 1901085 + ... + 1901198.

It is an arithmetic number, because the mean of its divisors is an integer number (38022840).

Almost surely, 2^216730131 is an apocalyptic number.

216730131 is a deficient number, since it is larger than the sum of its proper divisors (87452589).

216730131 is a wasteful number, since it uses less digits than its factorization.

216730131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802305.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 216730131 is about 14721.7570622531. The cubic root of 216730131 is about 600.6752869164.

Adding to 216730131 its reverse (131037612), we get a palindrome (347767743).

The spelling of 216730131 in words is "two hundred sixteen million, seven hundred thirty thousand, one hundred thirty-one".