216011773 has 4 divisors (see below), whose sum is σ = 216094108. Its totient is φ = 215929440.

The previous prime is 216011771. The next prime is 216011777. The reversal of 216011773 is 377110612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143472484 + 72539289 = 11978^2 + 8517^2 .

It is a cyclic number.

It is not a de Polignac number, because 216011773 - 2¹ = 216011771 is a prime.

It is a super-2 number, since 2×216011773² = 93322172149207058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216011771) 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, 37098 + ... + 42523.

It is an arithmetic number, because the mean of its divisors is an integer number (54023527).

Almost surely, 2^216011773 is an apocalyptic number.

It is an amenable number.

216011773 is a deficient number, since it is larger than the sum of its proper divisors (82335).

216011773 is an equidigital number, since it uses as much as digits as its factorization.

216011773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82334.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 216011773 is about 14697.3389768352. The cubic root of 216011773 is about 600.0109007279.

The spelling of 216011773 in words is "two hundred sixteen million, eleven thousand, seven hundred seventy-three".