21544061522 has 16 divisors (see below), whose sum is σ = 32494027392. Its totient is φ = 10712863440.

The previous prime is 21544061509. The next prime is 21544061593. The reversal of 21544061522 is 22516044512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266213 + ... + 337575.

It is an arithmetic number, because the mean of its divisors is an integer number (2030876712).

Almost surely, 2^21544061522 is an apocalyptic number.

21544061522 is a deficient number, since it is larger than the sum of its proper divisors (10949965870).

21544061522 is a wasteful number, since it uses less digits than its factorization.

21544061522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72193.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 21544061522 in words is "twenty-one billion, five hundred forty-four million, sixty-one thousand, five hundred twenty-two".