2815021839 has 32 divisors (see below), whose sum is σ = 4419748864. Its totient is φ = 1560487680.

The previous prime is 2815021813. The next prime is 2815021861. The reversal of 2815021839 is 9381205182.

It is not a de Polignac number, because 2815021839 - 2⁹ = 2815021327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2815021797 and 2815021806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815021889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78462 + ... + 108564.

It is an arithmetic number, because the mean of its divisors is an integer number (138117152).

Almost surely, 2^2815021839 is an apocalyptic number.

2815021839 is a deficient number, since it is larger than the sum of its proper divisors (1604727025).

2815021839 is a wasteful number, since it uses less digits than its factorization.

2815021839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30247.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 2815021839 is about 53056.7793877465. The cubic root of 2815021839 is about 1411.9758090843.

The spelling of 2815021839 in words is "two billion, eight hundred fifteen million, twenty-one thousand, eight hundred thirty-nine".