2213131 has 4 divisors (see below), whose sum is σ = 2224792. Its totient is φ = 2201472.

The previous prime is 2213093. The next prime is 2213137. The reversal of 2213131 is 1313122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313122 = 2 ⋅656561.

It is a cyclic number.

It is not a de Polignac number, because 2213131 - 2²¹ = 115979 is a prime.

It is a super-2 number, since 2×2213131² = 9795897646322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2213137) 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, 5541 + ... + 5926.

It is an arithmetic number, because the mean of its divisors is an integer number (556198).

2^2213131 is an apocalyptic number.

2213131 is a deficient number, since it is larger than the sum of its proper divisors (11661).

2213131 is a wasteful number, since it uses less digits than its factorization.

2213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11660.

The product of its digits is 36, while the sum is 13.

The square root of 2213131 is about 1487.6595712729. The cubic root of 2213131 is about 130.3173901536.

Adding to 2213131 its reverse (1313122), we get a palindrome (3526253).

Subtracting from 2213131 its reverse (1313122), we obtain a palindrome (900009).

It can be divided in two parts, 22 and 13131, that multiplied together give a palindrome (288882).

The spelling of 2213131 in words is "two million, two hundred thirteen thousand, one hundred thirty-one".