216731083 has 2 divisors, whose sum is σ = 216731084. Its totient is φ = 216731082.

The previous prime is 216731069. The next prime is 216731101. The reversal of 216731083 is 380137612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216731083 is a prime.

It is not a weakly prime, because it can be changed into another prime (216731003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108365541 + 108365542.

It is an arithmetic number, because the mean of its divisors is an integer number (108365542).

Almost surely, 2^216731083 is an apocalyptic number.

216731083 is a deficient number, since it is larger than the sum of its proper divisors (1).

216731083 is an equidigital number, since it uses as much as digits as its factorization.

216731083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 216731083 is about 14721.7893953147. The cubic root of 216731083 is about 600.6761664158.

Adding to 216731083 its reverse (380137612), we get a palindrome (596868695).

The spelling of 216731083 in words is "two hundred sixteen million, seven hundred thirty-one thousand, eighty-three".