2820723251 has 12 divisors (see below), whose sum is σ = 2924636832. Its totient is φ = 2720388384.

The previous prime is 2820723221. The next prime is 2820723259. The reversal of 2820723251 is 1523270282.

It is not a de Polignac number, because 2820723251 - 2⁶ = 2820723187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820723259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1195565 + ... + 1197921.

It is an arithmetic number, because the mean of its divisors is an integer number (243719736).

Almost surely, 2^2820723251 is an apocalyptic number.

2820723251 is a deficient number, since it is larger than the sum of its proper divisors (103913581).

2820723251 is a wasteful number, since it uses less digits than its factorization.

2820723251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838 (or 3809 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2820723251 is about 53110.4815549624. The cubic root of 2820723251 is about 1412.9284159106.

The spelling of 2820723251 in words is "two billion, eight hundred twenty million, seven hundred twenty-three thousand, two hundred fifty-one".