13222831 has 4 divisors (see below), whose sum is σ = 13351312. Its totient is φ = 13094352.

The previous prime is 13222823. The next prime is 13222843. The reversal of 13222831 is 13822231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13822231 = 257 ⋅53783.

It is a cyclic number.

It is not a de Polignac number, because 13222831 - 2³ = 13222823 is a prime.

It is a super-2 number, since 2×13222831² = 349686519309122, 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 (13222871) 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, 64086 + ... + 64291.

It is an arithmetic number, because the mean of its divisors is an integer number (3337828).

Almost surely, 2^13222831 is an apocalyptic number.

13222831 is a deficient number, since it is larger than the sum of its proper divisors (128481).

13222831 is a wasteful number, since it uses less digits than its factorization.

13222831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128480.

The product of its digits is 576, while the sum is 22.

The square root of 13222831 is about 3636.3210804328. The cubic root of 13222831 is about 236.4693272219.

The spelling of 13222831 in words is "thirteen million, two hundred twenty-two thousand, eight hundred thirty-one".