21541103255 has 16 divisors (see below), whose sum is σ = 30042800640. Its totient is φ = 14520684192.

The previous prime is 21541103251. The next prime is 21541103273. The reversal of 21541103255 is 55230114512.

It is not a de Polignac number, because 21541103255 - 2² = 21541103251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541103251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5213699 + ... + 5217828.

It is an arithmetic number, because the mean of its divisors is an integer number (1877675040).

Almost surely, 2^21541103255 is an apocalyptic number.

21541103255 is a deficient number, since it is larger than the sum of its proper divisors (8501697385).

21541103255 is a wasteful number, since it uses less digits than its factorization.

21541103255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431598.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 21541103255 its reverse (55230114512), we get a palindrome (76771217767).

The spelling of 21541103255 in words is "twenty-one billion, five hundred forty-one million, one hundred three thousand, two hundred fifty-five".