2154147568243 has 16 divisors (see below), whose sum is σ = 2371764384000. Its totient is φ = 1940165045280.

The previous prime is 2154147568171. The next prime is 2154147568253. The reversal of 2154147568243 is 3428657414512.

It is not a de Polignac number, because 2154147568243 - 2²¹ = 2154145471091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154147568253) 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, 13400458 + ... + 13560256.

It is an arithmetic number, because the mean of its divisors is an integer number (148235274000).

Almost surely, 2^{2154147568243} is an apocalyptic number.

2154147568243 is a deficient number, since it is larger than the sum of its proper divisors (217616815757).

2154147568243 is a wasteful number, since it uses less digits than its factorization.

2154147568243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171162.

The product of its digits is 6451200, while the sum is 52.

The spelling of 2154147568243 in words is "two trillion, one hundred fifty-four billion, one hundred forty-seven million, five hundred sixty-eight thousand, two hundred forty-three".