2820931361 has 4 divisors (see below), whose sum is σ = 2821063872. Its totient is φ = 2820798852.

The previous prime is 2820931357. The next prime is 2820931369. The reversal of 2820931361 is 1631390282.

2820931361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1631390282 = 2 ⋅815695141.

It is a cyclic number.

It is not a de Polignac number, because 2820931361 - 2² = 2820931357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820931369) 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, 26285 + ... + 79578.

It is an arithmetic number, because the mean of its divisors is an integer number (705265968).

Almost surely, 2^2820931361 is an apocalyptic number.

It is an amenable number.

2820931361 is a deficient number, since it is larger than the sum of its proper divisors (132511).

2820931361 is a wasteful number, since it uses less digits than its factorization.

2820931361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132510.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2820931361 is about 53112.4407366109. The cubic root of 2820931361 is about 1412.9631631811.

The spelling of 2820931361 in words is "two billion, eight hundred twenty million, nine hundred thirty-one thousand, three hundred sixty-one".