21550015041 has 16 divisors (see below), whose sum is σ = 29071610880. Its totient is φ = 14198118480.

The previous prime is 21550015033. The next prime is 21550015051. The reversal of 21550015041 is 14051005512.

It is not a de Polignac number, because 21550015041 - 2³ = 21550015033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21550015051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80700 + ... + 222738.

It is an arithmetic number, because the mean of its divisors is an integer number (1816975680).

Almost surely, 2^21550015041 is an apocalyptic number.

It is an amenable number.

21550015041 is a deficient number, since it is larger than the sum of its proper divisors (7521595839).

21550015041 is a wasteful number, since it uses less digits than its factorization.

21550015041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142636.

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 21550015041 in words is "twenty-one billion, five hundred fifty million, fifteen thousand, forty-one".