2154815384 has 32 divisors (see below), whose sum is σ = 4259692800. Its totient is φ = 1019077920.

The previous prime is 2154815381. The next prime is 2154815413. The reversal of 2154815384 is 4835184512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154815381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87389 + ... + 109299.

It is an arithmetic number, because the mean of its divisors is an integer number (133115400).

Almost surely, 2^2154815384 is an apocalyptic number.

It is an amenable number.

2154815384 is a deficient number, since it is larger than the sum of its proper divisors (2104877416).

2154815384 is a wasteful number, since it uses less digits than its factorization.

2154815384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22583 (or 22579 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 2154815384 is about 46419.9890564399. The cubic root of 2154815384 is about 1291.6257338806.

Adding to 2154815384 its reverse (4835184512), we get a palindrome (6989999896).

The spelling of 2154815384 in words is "two billion, one hundred fifty-four million, eight hundred fifteen thousand, three hundred eighty-four".