2223450021 has 24 divisors (see below), whose sum is σ = 3213362880. Its totient is φ = 1366924416.

The previous prime is 2223450017. The next prime is 2223450029. The reversal of 2223450021 is 1200543222.

It is not a de Polignac number, because 2223450021 - 2² = 2223450017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2223450021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223450029) 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, 813385 + ... + 816113.

It is an arithmetic number, because the mean of its divisors is an integer number (133890120).

Almost surely, 2^2223450021 is an apocalyptic number.

It is an amenable number.

2223450021 is a deficient number, since it is larger than the sum of its proper divisors (989912859).

2223450021 is a wasteful number, since it uses less digits than its factorization.

2223450021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4352 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2223450021 is about 47153.4730534242. The cubic root of 2223450021 is about 1305.1961696263.

Adding to 2223450021 its reverse (1200543222), we get a palindrome (3423993243).

The spelling of 2223450021 in words is "two billion, two hundred twenty-three million, four hundred fifty thousand, twenty-one".