21144303522 has 12 divisors (see below), whose sum is σ = 45812657670. Its totient is φ = 7048101168.

The previous prime is 21144303511. The next prime is 21144303559. The reversal of 21144303522 is 22530344112.

21144303522 is a `hidden beast` number, since 211 + 443 + 0 + 3 + 5 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21141450801 + 2852721 = 145401^2 + 1689^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 587341747 + ... + 587341782.

Almost surely, 2^21144303522 is an apocalyptic number.

21144303522 is an abundant number, since it is smaller than the sum of its proper divisors (24668354148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21144303522 is a wasteful number, since it uses less digits than its factorization.

21144303522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174683537 (or 1174683534 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21144303522 its reverse (22530344112), we get a palindrome (43674647634).

The spelling of 21144303522 in words is "twenty-one billion, one hundred forty-four million, three hundred three thousand, five hundred twenty-two".