827161551 has 12 divisors (see below), whose sum is σ = 1239040712. Its totient is φ = 551440872.

The previous prime is 827161549. The next prime is 827161607. The reversal of 827161551 is 155161728.

It is not a de Polignac number, because 827161551 - 2¹ = 827161549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827161501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701736 + ... + 1702221.

Almost surely, 2^827161551 is an apocalyptic number.

827161551 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

827161551 is a deficient number, since it is larger than the sum of its proper divisors (411879161).

827161551 is an equidigital number, since it uses as much as digits as its factorization.

827161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403972 (or 3403960 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 827161551 is about 28760.4163912834. The cubic root of 827161551 is about 938.7071221660.

The spelling of 827161551 in words is "eight hundred twenty-seven million, one hundred sixty-one thousand, five hundred fifty-one".