827139522 has 64 divisors (see below), whose sum is σ = 1939521024. Its totient is φ = 232362240.

The previous prime is 827139503. The next prime is 827139581. The reversal of 827139522 is 225931728.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 69673 + ... + 80675.

It is an arithmetic number, because the mean of its divisors is an integer number (30305016).

Almost surely, 2^827139522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 827139522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969760512).

827139522 is an abundant number, since it is smaller than the sum of its proper divisors (1112381502).

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

827139522 is a wasteful number, since it uses less digits than its factorization.

827139522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11103.

The product of its digits is 60480, while the sum is 39.

The square root of 827139522 is about 28760.0334144451. The cubic root of 827139522 is about 938.6987888633.

It can be divided in two parts, 82713 and 9522, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 827139522 in words is "eight hundred twenty-seven million, one hundred thirty-nine thousand, five hundred twenty-two".