2115822747 has 6 divisors (see below), whose sum is σ = 2821203228. Its totient is φ = 1410495384.

The previous prime is 2115822743. The next prime is 2115822769. The reversal of 2115822747 is 7472285112.

It is not a de Polignac number, because 2115822747 - 2² = 2115822743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2115822743) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66393 + ... + 92949.

It is an arithmetic number, because the mean of its divisors is an integer number (470200538).

Almost surely, 2^2115822747 is an apocalyptic number.

2115822747 is a deficient number, since it is larger than the sum of its proper divisors (705380481).

2115822747 is an frugal number, since it uses more digits than its factorization.

2115822747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53117 (or 26560 counting only the distinct ones).

The product of its digits is 62720, while the sum is 39.

The square root of 2115822747 is about 45998.0732966067. The cubic root of 2115822747 is about 1283.7873558486.

The spelling of 2115822747 in words is "two billion, one hundred fifteen million, eight hundred twenty-two thousand, seven hundred forty-seven".