216277601 has 4 divisors (see below), whose sum is σ = 216729600. Its totient is φ = 215825604.

The previous prime is 216277591. The next prime is 216277609. The reversal of 216277601 is 106772612.

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 a de Polignac number, because none of the positive numbers 2^k-216277601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216277609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225281 + ... + 226238.

It is an arithmetic number, because the mean of its divisors is an integer number (54182400).

Almost surely, 2^216277601 is an apocalyptic number.

It is an amenable number.

216277601 is a deficient number, since it is larger than the sum of its proper divisors (451999).

216277601 is an equidigital number, since it uses as much as digits as its factorization.

216277601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451998.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 216277601 is about 14706.3796020639. The cubic root of 216277601 is about 600.2569279273.

The spelling of 216277601 in words is "two hundred sixteen million, two hundred seventy-seven thousand, six hundred one".