216495601 has 4 divisors (see below), whose sum is σ = 247423552. Its totient is φ = 185567652.

The previous prime is 216495581. The next prime is 216495637. The reversal of 216495601 is 106594612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216495601 - 2⁵ = 216495569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216496601) 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, 15463965 + ... + 15463978.

It is an arithmetic number, because the mean of its divisors is an integer number (61855888).

Almost surely, 2^216495601 is an apocalyptic number.

It is an amenable number.

216495601 is a deficient number, since it is larger than the sum of its proper divisors (30927951).

216495601 is an equidigital number, since it uses as much as digits as its factorization.

216495601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30927950.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 216495601 is about 14713.7894846977. The cubic root of 216495601 is about 600.4585392951.

The spelling of 216495601 in words is "two hundred sixteen million, four hundred ninety-five thousand, six hundred one".