21513524244311 has 8 divisors (see below), whose sum is σ = 23495878233984. Its totient is φ = 19535600097720.

The previous prime is 21513524244269. The next prime is 21513524244349. The reversal of 21513524244311 is 11344242531512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21513524244311 - 2²² = 21513520050007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513524244211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107450611 + ... + 1107470036.

It is an arithmetic number, because the mean of its divisors is an integer number (2936984779248).

Almost surely, 2^{21513524244311} is an apocalyptic number.

21513524244311 is a deficient number, since it is larger than the sum of its proper divisors (1982353989673).

21513524244311 is a wasteful number, since it uses less digits than its factorization.

21513524244311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214921541.

The product of its digits is 115200, while the sum is 38.

Adding to 21513524244311 its reverse (11344242531512), we get a palindrome (32857766775823).

The spelling of 21513524244311 in words is "twenty-one trillion, five hundred thirteen billion, five hundred twenty-four million, two hundred forty-four thousand, three hundred eleven".