11222831 has 4 divisors (see below), whose sum is σ = 11294472. Its totient is φ = 11151192.

The previous prime is 11222791. The next prime is 11222843. The reversal of 11222831 is 13822211.

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

It is a cyclic number.

It is not a de Polignac number, because 11222831 - 2¹⁸ = 10960687 is a prime.

It is a super-2 number, since 2×11222831² = 251903871309122, 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 (11222851) 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, 35585 + ... + 35898.

It is an arithmetic number, because the mean of its divisors is an integer number (2823618).

Almost surely, 2^11222831 is an apocalyptic number.

11222831 is a deficient number, since it is larger than the sum of its proper divisors (71641).

11222831 is an equidigital number, since it uses as much as digits as its factorization.

11222831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71640.

The product of its digits is 192, while the sum is 20.

The square root of 11222831 is about 3350.0494026208. The cubic root of 11222831 is about 223.8897137261.

The spelling of 11222831 in words is "eleven million, two hundred twenty-two thousand, eight hundred thirty-one".