2821351842 has 12 divisors (see below), whose sum is σ = 6112929030. Its totient is φ = 940450608.

The previous prime is 2821351837. The next prime is 2821351849. The reversal of 2821351842 is 2481531282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2306016441 + 515335401 = 48021^2 + 22701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2821351797 and 2821351806.

It is not an unprimeable number, because it can be changed into a prime (2821351849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78370867 + ... + 78370902.

Almost surely, 2^2821351842 is an apocalyptic number.

2821351842 is an abundant number, since it is smaller than the sum of its proper divisors (3291577188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2821351842 is a wasteful number, since it uses less digits than its factorization.

2821351842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156741777 (or 156741774 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 2821351842 is about 53116.3989931546. The cubic root of 2821351842 is about 1413.0333639494.

The spelling of 2821351842 in words is "two billion, eight hundred twenty-one million, three hundred fifty-one thousand, eight hundred forty-two".