22291213 has 8 divisors (see below), whose sum is σ = 25548032. Its totient is φ = 19052496.

The previous prime is 22291211. The next prime is 22291229. The reversal of 22291213 is 31219222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22291213 - 2¹ = 22291211 is a prime.

It is a super-2 number, since 2×22291213² = 993796354022738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22291211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1770 + ... + 6907.

It is an arithmetic number, because the mean of its divisors is an integer number (3193504).

Almost surely, 2^22291213 is an apocalyptic number.

It is an amenable number.

22291213 is a deficient number, since it is larger than the sum of its proper divisors (3256819).

22291213 is an equidigital number, since it uses as much as digits as its factorization.

22291213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9051.

The product of its digits is 432, while the sum is 22.

The square root of 22291213 is about 4721.3571142204. The cubic root of 22291213 is about 281.4348665752.

The spelling of 22291213 in words is "twenty-two million, two hundred ninety-one thousand, two hundred thirteen".