827987397531 has 16 divisors (see below), whose sum is σ = 1285500651264. Its totient is φ = 464208567264.

The previous prime is 827987397499. The next prime is 827987397551. The reversal of 827987397531 is 135793789728.

827987397531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 827987397531 - 2⁵ = 827987397499 is a prime.

It is a super-2 number, since 2×827987397531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (827987397551) 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, 371960881 + ... + 371963106.

It is an arithmetic number, because the mean of its divisors is an integer number (80343790704).

Almost surely, 2^827987397531 is an apocalyptic number.

827987397531 is a deficient number, since it is larger than the sum of its proper divisors (457513253733).

827987397531 is a wasteful number, since it uses less digits than its factorization.

827987397531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743924050.

The product of its digits is 160030080, while the sum is 69.

The spelling of 827987397531 in words is "eight hundred twenty-seven billion, nine hundred eighty-seven million, three hundred ninety-seven thousand, five hundred thirty-one".