2154011015 has 16 divisors (see below), whose sum is σ = 2784874176. Its totient is φ = 1589952000.

The previous prime is 2154011011. The next prime is 2154011023. The reversal of 2154011015 is 5101104512.

It is not a de Polignac number, because 2154011015 - 2² = 2154011011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154011011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 176150 + ... + 187980.

It is an arithmetic number, because the mean of its divisors is an integer number (174054636).

Almost surely, 2^2154011015 is an apocalyptic number.

2154011015 is a deficient number, since it is larger than the sum of its proper divisors (630863161).

2154011015 is a wasteful number, since it uses less digits than its factorization.

2154011015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14650.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 2154011015 is about 46411.3242108001. The cubic root of 2154011015 is about 1291.4649972950.

Adding to 2154011015 its reverse (5101104512), we get a palindrome (7255115527).

The spelling of 2154011015 in words is "two billion, one hundred fifty-four million, eleven thousand, fifteen".