21541010055 has 8 divisors (see below), whose sum is σ = 34465616112. Its totient is φ = 11488538688.

The previous prime is 21541010053. The next prime is 21541010059. The reversal of 21541010055 is 55001014512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21541010055 - 2¹ = 21541010053 is a prime.

It is a super-2 number, since 2×21541010055² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541010053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718033654 + ... + 718033683.

It is an arithmetic number, because the mean of its divisors is an integer number (4308202014).

Almost surely, 2^21541010055 is an apocalyptic number.

21541010055 is a deficient number, since it is larger than the sum of its proper divisors (12924606057).

21541010055 is a wasteful number, since it uses less digits than its factorization.

21541010055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436067345.

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

Adding to 21541010055 its reverse (55001014512), we get a palindrome (76542024567).

The spelling of 21541010055 in words is "twenty-one billion, five hundred forty-one million, ten thousand, fifty-five".