2154155460 has 24 divisors (see below), whose sum is σ = 6031635456. Its totient is φ = 574441440.

The previous prime is 2154155441. The next prime is 2154155483. The reversal of 2154155460 is 645514512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17951236 + ... + 17951355.

It is an arithmetic number, because the mean of its divisors is an integer number (251318144).

Almost surely, 2^2154155460 is an apocalyptic number.

2154155460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154155460 is an abundant number, since it is smaller than the sum of its proper divisors (3877479996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154155460 is a wasteful number, since it uses less digits than its factorization.

2154155460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35902603 (or 35902601 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 2154155460 is about 46412.8803243238. The cubic root of 2154155460 is about 1291.4938646020.

Adding to 2154155460 its reverse (645514512), we get a palindrome (2799669972).

The spelling of 2154155460 in words is "two billion, one hundred fifty-four million, one hundred fifty-five thousand, four hundred sixty".