2215543213 has 4 divisors (see below), whose sum is σ = 2385969628. Its totient is φ = 2045116800.

The previous prime is 2215543193. The next prime is 2215543237. The reversal of 2215543213 is 3123455122.

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 363359844 + 1852183369 = 19062^2 + 43037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2215543213 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 (2215543283) 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, 85213188 + ... + 85213213.

It is an arithmetic number, because the mean of its divisors is an integer number (596492407).

Almost surely, 2^2215543213 is an apocalyptic number.

It is an amenable number.

2215543213 is a deficient number, since it is larger than the sum of its proper divisors (170426415).

2215543213 is a wasteful number, since it uses less digits than its factorization.

2215543213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170426414.

The product of its digits is 7200, while the sum is 28.

The square root of 2215543213 is about 47069.5571787116. The cubic root of 2215543213 is about 1303.6471965519.

Adding to 2215543213 its reverse (3123455122), we get a palindrome (5338998335).

The spelling of 2215543213 in words is "two billion, two hundred fifteen million, five hundred forty-three thousand, two hundred thirteen".