216495059 has 4 divisors (see below), whose sum is σ = 236176440. Its totient is φ = 196813680.

The previous prime is 216495053. The next prime is 216495061. The reversal of 216495059 is 950594612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216495059 is a prime.

It is a super-2 number, since 2×216495059² = 93740221142826962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216495053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9840674 + ... + 9840695.

It is an arithmetic number, because the mean of its divisors is an integer number (59044110).

Almost surely, 2^216495059 is an apocalyptic number.

216495059 is a deficient number, since it is larger than the sum of its proper divisors (19681381).

216495059 is a wasteful number, since it uses less digits than its factorization.

216495059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681380.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 216495059 is about 14713.7710665893. The cubic root of 216495059 is about 600.4580382090.

The spelling of 216495059 in words is "two hundred sixteen million, four hundred ninety-five thousand, fifty-nine".