2815538889 has 4 divisors (see below), whose sum is σ = 3754051856. Its totient is φ = 1877025924.

The previous prime is 2815538881. The next prime is 2815538893. The reversal of 2815538889 is 9888355182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2815538889 - 2³ = 2815538881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2815538881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469256479 + ... + 469256484.

It is an arithmetic number, because the mean of its divisors is an integer number (938512964).

Almost surely, 2^2815538889 is an apocalyptic number.

It is an amenable number.

2815538889 is a deficient number, since it is larger than the sum of its proper divisors (938512967).

2815538889 is an equidigital number, since it uses as much as digits as its factorization.

2815538889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938512966.

The product of its digits is 5529600, while the sum is 57.

The square root of 2815538889 is about 53061.6517741391. The cubic root of 2815538889 is about 1412.0622521554.

The spelling of 2815538889 in words is "two billion, eight hundred fifteen million, five hundred thirty-eight thousand, eight hundred eighty-nine".