2221223531 has 4 divisors (see below), whose sum is σ = 2242788912. Its totient is φ = 2199658152.

The previous prime is 2221223527. The next prime is 2221223603. The reversal of 2221223531 is 1353221222.

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 2221223531 - 2² = 2221223527 is a prime.

It is a super-2 number, since 2×2221223531² = 9867667949336215922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221223497 and 2221223506.

It is not an unprimeable number, because it can be changed into a prime (2221220531) 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, 10782536 + ... + 10782741.

It is an arithmetic number, because the mean of its divisors is an integer number (560697228).

Almost surely, 2^2221223531 is an apocalyptic number.

2221223531 is a deficient number, since it is larger than the sum of its proper divisors (21565381).

2221223531 is a wasteful number, since it uses less digits than its factorization.

2221223531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21565380.

The product of its digits is 1440, while the sum is 23.

The square root of 2221223531 is about 47129.8581686811. The cubic root of 2221223531 is about 1304.7603639001.

Adding to 2221223531 its reverse (1353221222), we get a palindrome (3574444753).

The spelling of 2221223531 in words is "two billion, two hundred twenty-one million, two hundred twenty-three thousand, five hundred thirty-one".