2154120585 has 8 divisors (see below), whose sum is σ = 3446592960. Its totient is φ = 1148864304.

The previous prime is 2154120583. The next prime is 2154120593. The reversal of 2154120585 is 5850214512.

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

It is not a de Polignac number, because 2154120585 - 2¹ = 2154120583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154120581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71804005 + ... + 71804034.

It is an arithmetic number, because the mean of its divisors is an integer number (430824120).

Almost surely, 2^2154120585 is an apocalyptic number.

It is an amenable number.

2154120585 is a deficient number, since it is larger than the sum of its proper divisors (1292472375).

2154120585 is a wasteful number, since it uses less digits than its factorization.

2154120585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143608047.

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 2154120585 is about 46412.5046189063. The cubic root of 2154120585 is about 1291.4868949578.

The spelling of 2154120585 in words is "two billion, one hundred fifty-four million, one hundred twenty thousand, five hundred eighty-five".