2158915652 has 12 divisors (see below), whose sum is σ = 3780552300. Its totient is φ = 1078757856.

The previous prime is 2158915601. The next prime is 2158915657. The reversal of 2158915652 is 2565198512.

It can be written as a sum of positive squares in 2 ways, for example, as 1479479296 + 679436356 = 38464^2 + 26066^2 .

It is not an unprimeable number, because it can be changed into a prime (2158915657) 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 3 ways as a sum of consecutive naturals, for example, 168023 + ... + 180414.

It is an arithmetic number, because the mean of its divisors is an integer number (315046025).

Almost surely, 2^2158915652 is an apocalyptic number.

It is an amenable number.

2158915652 is a deficient number, since it is larger than the sum of its proper divisors (1621636648).

2158915652 is a wasteful number, since it uses less digits than its factorization.

2158915652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349990 (or 349988 counting only the distinct ones).

The product of its digits is 216000, while the sum is 44.

The square root of 2158915652 is about 46464.1329629640. The cubic root of 2158915652 is about 1292.4444669836. Note that the first 4 decimals are identical.

The spelling of 2158915652 in words is "two billion, one hundred fifty-eight million, nine hundred fifteen thousand, six hundred fifty-two".