21154521552235 has 8 divisors (see below), whose sum is σ = 25391573968320. Its totient is φ = 16919518504704.

The previous prime is 21154521552221. The next prime is 21154521552247. The reversal of 21154521552235 is 53225512545112.

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 21154521552235 - 2¹¹ = 21154521550187 is a prime.

It is a super-2 number, since 2×21154521552235² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21154521552191 and 21154521552200.

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, 512319427 + ... + 512360716.

It is an arithmetic number, because the mean of its divisors is an integer number (3173946746040).

Almost surely, 2^{21154521552235} is an apocalyptic number.

21154521552235 is a deficient number, since it is larger than the sum of its proper divisors (4237052416085).

21154521552235 is a wasteful number, since it uses less digits than its factorization.

21154521552235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024684277.

The product of its digits is 600000, while the sum is 43.

The spelling of 21154521552235 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred twenty-one million, five hundred fifty-two thousand, two hundred thirty-five".