2154646015 has 4 divisors (see below), whose sum is σ = 2585575224. Its totient is φ = 1723716808.

The previous prime is 2154646009. The next prime is 2154646057. The reversal of 2154646015 is 5106464512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154646015 - 2¹⁹ = 2154121727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 215464597 + ... + 215464606.

It is an arithmetic number, because the mean of its divisors is an integer number (646393806).

Almost surely, 2^2154646015 is an apocalyptic number.

2154646015 is a deficient number, since it is larger than the sum of its proper divisors (430929209).

2154646015 is an equidigital number, since it uses as much as digits as its factorization.

2154646015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430929208.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 2154646015 is about 46418.1647095186. The cubic root of 2154646015 is about 1291.5918922976.

The spelling of 2154646015 in words is "two billion, one hundred fifty-four million, six hundred forty-six thousand, fifteen".