2821542251 has 12 divisors (see below), whose sum is σ = 3152214912. Its totient is φ = 2522982000.

The previous prime is 2821542247. The next prime is 2821542259. The reversal of 2821542251 is 1522451282.

It is not a de Polignac number, because 2821542251 - 2² = 2821542247 is a prime.

It is a super-2 number, since 2×2821542251² = 15922201348356294002, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2821542259) 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, 183755 + ... + 198516.

It is an arithmetic number, because the mean of its divisors is an integer number (262684576).

Almost surely, 2^2821542251 is an apocalyptic number.

2821542251 is a deficient number, since it is larger than the sum of its proper divisors (330672661).

2821542251 is a wasteful number, since it uses less digits than its factorization.

2821542251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382354 (or 382343 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 2821542251 is about 53118.1913378082. The cubic root of 2821542251 is about 1413.0651511011.

The spelling of 2821542251 in words is "two billion, eight hundred twenty-one million, five hundred forty-two thousand, two hundred fifty-one".