21155143154353 has 8 divisors (see below), whose sum is σ = 23070847452800. Its totient is φ = 19280636797968.

The previous prime is 21155143154339. The next prime is 21155143154359. The reversal of 21155143154353 is 35345134155112.

It is a happy number.

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

It is not a de Polignac number, because 21155143154353 - 2⁹ = 21155143153841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21155143154359) 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, 10299484443 + ... + 10299486496.

It is an arithmetic number, because the mean of its divisors is an integer number (2883855931600).

Almost surely, 2^{21155143154353} is an apocalyptic number.

It is an amenable number.

21155143154353 is a deficient number, since it is larger than the sum of its proper divisors (1915704298447).

21155143154353 is a wasteful number, since it uses less digits than its factorization.

21155143154353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20598971031.

The product of its digits is 540000, while the sum is 43.

The spelling of 21155143154353 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred forty-three million, one hundred fifty-four thousand, three hundred fifty-three".