216273901 has 4 divisors (see below), whose sum is σ = 216484704. Its totient is φ = 216063100.

The previous prime is 216273877. The next prime is 216273913. The reversal of 216273901 is 109372612.

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 216273901 - 2⁷ = 216273773 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216273601) 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, 103855 + ... + 105916.

It is an arithmetic number, because the mean of its divisors is an integer number (54121176).

Almost surely, 2^216273901 is an apocalyptic number.

It is an amenable number.

216273901 is a deficient number, since it is larger than the sum of its proper divisors (210803).

216273901 is a wasteful number, since it uses less digits than its factorization.

216273901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210802.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 216273901 is about 14706.2538057794. The cubic root of 216273901 is about 600.2535049140.

The spelling of 216273901 in words is "two hundred sixteen million, two hundred seventy-three thousand, nine hundred one".