2222351521 has 6 divisors (see below), whose sum is σ = 2406451830. Its totient is φ = 2051401248.

The previous prime is 2222351513. The next prime is 2222351557. The reversal of 2222351521 is 1251532222.

It can be written as a sum of positive squares in 3 ways, for example, as 155376225 + 2066975296 = 12465^2 + 45464^2 .

It is not a de Polignac number, because 2222351521 - 2³ = 2222351513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222351501) 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 5 ways as a sum of consecutive naturals, for example, 6574836 + ... + 6575173.

It is an arithmetic number, because the mean of its divisors is an integer number (401075305).

Almost surely, 2^2222351521 is an apocalyptic number.

It is an amenable number.

2222351521 is a deficient number, since it is larger than the sum of its proper divisors (184100309).

2222351521 is a wasteful number, since it uses less digits than its factorization.

2222351521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13150035 (or 13150022 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2222351521 is about 47141.8234797934. The cubic root of 2222351521 is about 1304.9811892788.

Adding to 2222351521 its reverse (1251532222), we get a palindrome (3473883743).

The spelling of 2222351521 in words is "two billion, two hundred twenty-two million, three hundred fifty-one thousand, five hundred twenty-one".