2223031221 has 24 divisors (see below), whose sum is σ = 3327831000. Its totient is φ = 1428306432.

The previous prime is 2223031171. The next prime is 2223031271. The reversal of 2223031221 is 1221303222.

It is an interprime number because it is at equal distance from previous prime (2223031171) and next prime (2223031271).

It can be written as a sum of positive squares in 4 ways, for example, as 52403121 + 2170628100 = 7239^2 + 46590^2 .

It is not a de Polignac number, because 2223031221 - 2⁹ = 2223030709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2223031194 and 2223031203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223031271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141025 + ... + 155993.

It is an arithmetic number, because the mean of its divisors is an integer number (138659625).

Almost surely, 2^2223031221 is an apocalyptic number.

It is an amenable number.

2223031221 is a deficient number, since it is larger than the sum of its proper divisors (1104799779).

2223031221 is a wasteful number, since it uses less digits than its factorization.

2223031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15573 (or 15570 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2223031221 is about 47149.0320261191. The cubic root of 2223031221 is about 1305.1142173339.

Adding to 2223031221 its reverse (1221303222), we get a palindrome (3444334443).

The spelling of 2223031221 in words is "two billion, two hundred twenty-three million, thirty-one thousand, two hundred twenty-one".