2216761837 has 4 divisors (see below), whose sum is σ = 2238710076. Its totient is φ = 2194813600.

The previous prime is 2216761831. The next prime is 2216761879. The reversal of 2216761837 is 7381676122.

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 2185469001 + 31292836 = 46749^2 + 5594^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216761837 - 2¹⁹ = 2216237549 is a prime.

It is a super-2 number, since 2×2216761837² = 9828066083959229138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2216761793 and 2216761802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216761831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10973968 + ... + 10974169.

It is an arithmetic number, because the mean of its divisors is an integer number (559677519).

Almost surely, 2^2216761837 is an apocalyptic number.

It is an amenable number.

2216761837 is a deficient number, since it is larger than the sum of its proper divisors (21948239).

2216761837 is a wasteful number, since it uses less digits than its factorization.

2216761837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21948238.

The product of its digits is 169344, while the sum is 43.

The square root of 2216761837 is about 47082.5003265545. The cubic root of 2216761837 is about 1303.8861694848.

The spelling of 2216761837 in words is "two billion, two hundred sixteen million, seven hundred sixty-one thousand, eight hundred thirty-seven".