1086820231 has 4 divisors (see below), whose sum is σ = 1242080272. Its totient is φ = 931560192.

The previous prime is 1086820213. The next prime is 1086820247. The reversal of 1086820231 is 1320286801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1086820231 - 2¹⁵ = 1086787463 is a prime.

It is a super-2 number, since 2×1086820231² = 2362356429021786722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1086820193 and 1086820202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086820261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77630010 + ... + 77630023.

It is an arithmetic number, because the mean of its divisors is an integer number (310520068).

Almost surely, 2^1086820231 is an apocalyptic number.

1086820231 is a deficient number, since it is larger than the sum of its proper divisors (155260041).

1086820231 is an equidigital number, since it uses as much as digits as its factorization.

1086820231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155260040.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1086820231 is about 32966.9566535948. The cubic root of 1086820231 is about 1028.1407471170.

The spelling of 1086820231 in words is "one billion, eighty-six million, eight hundred twenty thousand, two hundred thirty-one".