2821540609 has 16 divisors (see below), whose sum is σ = 3087452160. Its totient is φ = 2566932480.

The previous prime is 2821540493. The next prime is 2821540621. The reversal of 2821540609 is 9060451282.

It is a cyclic number.

It is not a de Polignac number, because 2821540609 - 2¹¹ = 2821538561 is a prime.

It is a super-2 number, since 2×2821540609² = 15922182816472181762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2821540669) 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, 544977 + ... + 550129.

It is an arithmetic number, because the mean of its divisors is an integer number (192965760).

Almost surely, 2^2821540609 is an apocalyptic number.

It is an amenable number.

2821540609 is a deficient number, since it is larger than the sum of its proper divisors (265911551).

2821540609 is a wasteful number, since it uses less digits than its factorization.

2821540609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2821540609 is about 53118.1758817074. The cubic root of 2821540609 is about 1413.0648769894.

The spelling of 2821540609 in words is "two billion, eight hundred twenty-one million, five hundred forty thousand, six hundred nine".