2215021071 has 4 divisors (see below), whose sum is σ = 2953361432. Its totient is φ = 1476680712.

The previous prime is 2215021043. The next prime is 2215021091. The reversal of 2215021071 is 1701205122.

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

It is not a de Polignac number, because 2215021071 - 2¹⁸ = 2214758927 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 (2215021091) 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, 369170176 + ... + 369170181.

It is an arithmetic number, because the mean of its divisors is an integer number (738340358).

Almost surely, 2^2215021071 is an apocalyptic number.

2215021071 is a deficient number, since it is larger than the sum of its proper divisors (738340361).

2215021071 is an equidigital number, since it uses as much as digits as its factorization.

2215021071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738340360.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 2215021071 is about 47064.0103582345. The cubic root of 2215021071 is about 1303.5447773603.

Adding to 2215021071 its reverse (1701205122), we get a palindrome (3916226193).

The spelling of 2215021071 in words is "two billion, two hundred fifteen million, twenty-one thousand, seventy-one".