2213767021 has 4 divisors (see below), whose sum is σ = 2213876700. Its totient is φ = 2213657344.

The previous prime is 2213767019. The next prime is 2213767027. The reversal of 2213767021 is 1207673122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1882344996 + 331422025 = 43386^2 + 18205^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213767021 - 2¹ = 2213767019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213767027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14836 + ... + 68173.

It is an arithmetic number, because the mean of its divisors is an integer number (553469175).

Almost surely, 2^2213767021 is an apocalyptic number.

It is an amenable number.

2213767021 is a deficient number, since it is larger than the sum of its proper divisors (109679).

2213767021 is an equidigital number, since it uses as much as digits as its factorization.

2213767021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109678.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 2213767021 is about 47050.6856591910. The cubic root of 2213767021 is about 1303.2987271914.

The spelling of 2213767021 in words is "two billion, two hundred thirteen million, seven hundred sixty-seven thousand, twenty-one".