1082686221 has 12 divisors (see below), whose sum is σ = 1602024060. Its totient is φ = 704185920.

The previous prime is 1082686211. The next prime is 1082686237. The reversal of 1082686221 is 1226862801.

1082686221 is a `hidden beast` number, since 1 + 0 + 8 + 26 + 8 + 622 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 97416900 + 985269321 = 9870^2 + 31389^2 .

It is not a de Polignac number, because 1082686221 - 2¹³ = 1082678029 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1082686211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1466686 + ... + 1467423.

It is an arithmetic number, because the mean of its divisors is an integer number (133502005).

Almost surely, 2^1082686221 is an apocalyptic number.

It is an amenable number.

1082686221 is a deficient number, since it is larger than the sum of its proper divisors (519337839).

1082686221 is a wasteful number, since it uses less digits than its factorization.

1082686221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934156 (or 2934153 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1082686221 is about 32904.1976197567. The cubic root of 1082686221 is about 1026.8354884272.

The spelling of 1082686221 in words is "one billion, eighty-two million, six hundred eighty-six thousand, two hundred twenty-one".