21223232313 has 64 divisors (see below), whose sum is σ = 32478105600. Its totient is φ = 12254457600.

The previous prime is 21223232311. The next prime is 21223232347. The reversal of 21223232313 is 31323232212.

It is not a de Polignac number, because 21223232313 - 2¹ = 21223232311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223232311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3837156 + ... + 3842682.

It is an arithmetic number, because the mean of its divisors is an integer number (507470400).

Almost surely, 2^21223232313 is an apocalyptic number.

21223232313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21223232313 is a deficient number, since it is larger than the sum of its proper divisors (11254873287).

21223232313 is a wasteful number, since it uses less digits than its factorization.

21223232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702.

The product of its digits is 2592, while the sum is 24.

Adding to 21223232313 its reverse (31323232212), we get a palindrome (52546464525).

The spelling of 21223232313 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-two thousand, three hundred thirteen".