2154185317235 has 12 divisors (see below), whose sum is σ = 2954323200528. Its totient is φ = 1477149691968.

The previous prime is 2154185317199. The next prime is 2154185317247. The reversal of 2154185317235 is 5327135814512.

It is not a de Polignac number, because 2154185317235 - 2²⁰ = 2154184268659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154185317235.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8559071 + ... + 8807159.

It is an arithmetic number, because the mean of its divisors is an integer number (246193600044).

Almost surely, 2^{2154185317235} is an apocalyptic number.

2154185317235 is a deficient number, since it is larger than the sum of its proper divisors (800137883293).

2154185317235 is an frugal number, since it uses more digits than its factorization.

2154185317235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496190 (or 248101 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 47.

The spelling of 2154185317235 in words is "two trillion, one hundred fifty-four billion, one hundred eighty-five million, three hundred seventeen thousand, two hundred thirty-five".