21415041155 has 8 divisors (see below), whose sum is σ = 26584189200. Its totient is φ = 16541273056.

The previous prime is 21415041143. The next prime is 21415041161. The reversal of 21415041155 is 55114051412.

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 21415041155 - 2⁶ = 21415041091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73844825 + ... + 73845114.

It is an arithmetic number, because the mean of its divisors is an integer number (3323023650).

Almost surely, 2^21415041155 is an apocalyptic number.

21415041155 is a deficient number, since it is larger than the sum of its proper divisors (5169148045).

21415041155 is a wasteful number, since it uses less digits than its factorization.

21415041155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147689973.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 21415041155 its reverse (55114051412), we get a palindrome (76529092567).

The spelling of 21415041155 in words is "twenty-one billion, four hundred fifteen million, forty-one thousand, one hundred fifty-five".