2231213 has 4 divisors (see below), whose sum is σ = 2235840. Its totient is φ = 2226588.

The previous prime is 2231209. The next prime is 2231219. The reversal of 2231213 is 3121322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2231213 - 2² = 2231209 is a prime.

It is a super-3 number, since 3×2231213³ = 33323019685030141791, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231219) 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, 1493 + ... + 2586.

It is an arithmetic number, because the mean of its divisors is an integer number (558960).

2^2231213 is an apocalyptic number.

It is an amenable number.

2231213 is a deficient number, since it is larger than the sum of its proper divisors (4627).

2231213 is an equidigital number, since it uses as much as digits as its factorization.

2231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626.

The product of its digits is 72, while the sum is 14.

The square root of 2231213 is about 1493.7245395320. The cubic root of 2231213 is about 130.6713397549.

Adding to 2231213 its reverse (3121322), we get a palindrome (5352535).

It can be divided in two parts, 22 and 31213, that multiplied together give a palindrome (686686).

The spelling of 2231213 in words is "two million, two hundred thirty-one thousand, two hundred thirteen".