2223221531 has 2 divisors, whose sum is σ = 2223221532. Its totient is φ = 2223221530.

The previous prime is 2223221527. The next prime is 2223221543. The reversal of 2223221531 is 1351223222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2223221531 - 2² = 2223221527 is a prime.

It is a super-2 number, since 2×2223221531² = 9885427951803967922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2223221497 and 2223221506.

It is not a weakly prime, because it can be changed into another prime (2223221501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111610765 + 1111610766.

It is an arithmetic number, because the mean of its divisors is an integer number (1111610766).

Almost surely, 2^2223221531 is an apocalyptic number.

2223221531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2223221531 is an equidigital number, since it uses as much as digits as its factorization.

2223221531 is an evil number, because the sum of its binary digits is even.

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

The square root of 2223221531 is about 47151.0501579763. The cubic root of 2223221531 is about 1305.1514591559.

Adding to 2223221531 its reverse (1351223222), we get a palindrome (3574444753).

The spelling of 2223221531 in words is "two billion, two hundred twenty-three million, two hundred twenty-one thousand, five hundred thirty-one".