1220522709 has 16 divisors (see below), whose sum is σ = 1890335360. Its totient is φ = 686007360.

The previous prime is 1220522689. The next prime is 1220522711. The reversal of 1220522709 is 9072250221.

It is not a de Polignac number, because 1220522709 - 2⁸ = 1220522453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220522729) 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, 475114 + ... + 477675.

It is an arithmetic number, because the mean of its divisors is an integer number (118145960).

Almost surely, 2^1220522709 is an apocalyptic number.

It is an amenable number.

1220522709 is a deficient number, since it is larger than the sum of its proper divisors (669812651).

1220522709 is an equidigital number, since it uses as much as digits as its factorization.

1220522709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952860.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1220522709 is about 34935.9801494104. The cubic root of 1220522709 is about 1068.6823122140.

The spelling of 1220522709 in words is "one billion, two hundred twenty million, five hundred twenty-two thousand, seven hundred nine".