21155143154319 has 12 divisors (see below), whose sum is σ = 30557475436176. Its totient is φ = 14103407337792.

The previous prime is 21155143154291. The next prime is 21155143154339. The reversal of 21155143154319 is 91345134155112.

21155143154319 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 5 + 14 + 315 + 4 + 319 = 666.

It is not a de Polignac number, because 21155143154319 - 2¹¹ = 21155143152271 is a prime.

It is a super-2 number, since 2×21155143154319² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155143154339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6478327 + ... + 9180359.

It is an arithmetic number, because the mean of its divisors is an integer number (2546456286348).

Almost surely, 2^{21155143154319} is an apocalyptic number.

21155143154319 is a deficient number, since it is larger than the sum of its proper divisors (9402332281857).

21155143154319 is a wasteful number, since it uses less digits than its factorization.

21155143154319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571966 (or 3571963 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 21155143154319 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred forty-three million, one hundred fifty-four thousand, three hundred nineteen".