2223220521 has 32 divisors (see below), whose sum is σ = 3132960768. Its totient is φ = 1400368320.

The previous prime is 2223220501. The next prime is 2223220537. The reversal of 2223220521 is 1250223222.

It is not a de Polignac number, because 2223220521 - 2⁷ = 2223220393 is a prime.

It is a super-2 number, since 2×2223220521² = 9885418969991022882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2223220501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1117890 + ... + 1119876.

It is an arithmetic number, because the mean of its divisors is an integer number (97905024).

Almost surely, 2^2223220521 is an apocalyptic number.

It is an amenable number.

2223220521 is a deficient number, since it is larger than the sum of its proper divisors (909740247).

2223220521 is a wasteful number, since it uses less digits than its factorization.

2223220521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301.

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

The square root of 2223220521 is about 47151.0394477153. The cubic root of 2223220521 is about 1305.1512615143.

Adding to 2223220521 its reverse (1250223222), we get a palindrome (3473443743).

The spelling of 2223220521 in words is "two billion, two hundred twenty-three million, two hundred twenty thousand, five hundred twenty-one".