1065222091 has 4 divisors (see below), whose sum is σ = 1127882232. Its totient is φ = 1002561952.

The previous prime is 1065222071. The next prime is 1065222121. The reversal of 1065222091 is 1902225601.

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 1065222091 - 2⁹ = 1065221579 is a prime.

It is a super-2 number, since 2×1065222091² = 2269396206308824562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065222071) 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, 31330045 + ... + 31330078.

It is an arithmetic number, because the mean of its divisors is an integer number (281970558).

Almost surely, 2^1065222091 is an apocalyptic number.

1065222091 is a deficient number, since it is larger than the sum of its proper divisors (62660141).

1065222091 is an equidigital number, since it uses as much as digits as its factorization.

1065222091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62660140.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1065222091 is about 32637.7402863617. The cubic root of 1065222091 is about 1021.2844548311.

Adding to 1065222091 its reverse (1902225601), we get a palindrome (2967447692).

The spelling of 1065222091 in words is "one billion, sixty-five million, two hundred twenty-two thousand, ninety-one".