2875861821 has 16 divisors (see below), whose sum is σ = 4533379200. Its totient is φ = 1586682048.

The previous prime is 2875861789. The next prime is 2875861861. The reversal of 2875861821 is 1281685782.

It is not a de Polignac number, because 2875861821 - 2⁵ = 2875861789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2875861861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2360526 + ... + 2361743.

It is an arithmetic number, because the mean of its divisors is an integer number (283336200).

Almost surely, 2^2875861821 is an apocalyptic number.

2875861821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2875861821 is a deficient number, since it is larger than the sum of its proper divisors (1657517379).

2875861821 is a wasteful number, since it uses less digits than its factorization.

2875861821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722308.

The product of its digits is 430080, while the sum is 48.

The square root of 2875861821 is about 53627.0623939071. The cubic root of 2875861821 is about 1422.0755571390.

The spelling of 2875861821 in words is "two billion, eight hundred seventy-five million, eight hundred sixty-one thousand, eight hundred twenty-one".