8087821551 has 6 divisors (see below), whose sum is σ = 11682408920. Its totient is φ = 5391881028.

The previous prime is 8087821537. The next prime is 8087821607. The reversal of 8087821551 is 1551287808.

8087821551 is a `hidden beast` number, since 8 + 0 + 8 + 78 + 21 + 551 = 666.

It is not a de Polignac number, because 8087821551 - 2⁶ = 8087821487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8087821497 and 8087821506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8087821501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 449323411 + ... + 449323428.

Almost surely, 2^8087821551 is an apocalyptic number.

8087821551 is a deficient number, since it is larger than the sum of its proper divisors (3594587369).

8087821551 is a wasteful number, since it uses less digits than its factorization.

8087821551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898646845 (or 898646842 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 45.

The square root of 8087821551 is about 89932.3164996877. The cubic root of 8087821551 is about 2007.2918447737.

The spelling of 8087821551 in words is "eight billion, eighty-seven million, eight hundred twenty-one thousand, five hundred fifty-one".