21232441215 has 24 divisors (see below), whose sum is σ = 37426680720. Its totient is φ = 11132035584.

The previous prime is 21232441201. The next prime is 21232441249. The reversal of 21232441215 is 51214423212.

21232441215 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 2 + 441 + 215 = 666.

It is not a de Polignac number, because 21232441215 - 2⁴ = 21232441199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3995922 + ... + 4001231.

It is an arithmetic number, because the mean of its divisors is an integer number (1559445030).

Almost surely, 2^21232441215 is an apocalyptic number.

21232441215 is a deficient number, since it is larger than the sum of its proper divisors (16194239505).

21232441215 is a wasteful number, since it uses less digits than its factorization.

21232441215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7997223 (or 7997220 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

Adding to 21232441215 its reverse (51214423212), we get a palindrome (72446864427).

The spelling of 21232441215 in words is "twenty-one billion, two hundred thirty-two million, four hundred forty-one thousand, two hundred fifteen".