7122206409 has 16 divisors (see below), whose sum is σ = 9690544512. Its totient is φ = 4651282688.

The previous prime is 7122206363. The next prime is 7122206431. The reversal of 7122206409 is 9046022217.

It is a cyclic number.

It is not a de Polignac number, because 7122206409 - 2⁷ = 7122206281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7122206409.

It is not an unprimeable number, because it can be changed into a prime (7122206459) 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, 68257 + ... + 137489.

It is an arithmetic number, because the mean of its divisors is an integer number (605659032).

Almost surely, 2^7122206409 is an apocalyptic number.

It is an amenable number.

7122206409 is a deficient number, since it is larger than the sum of its proper divisors (2568338103).

7122206409 is a wasteful number, since it uses less digits than its factorization.

7122206409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69936.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 7122206409 is about 84393.1656533869. The cubic root of 7122206409 is about 1923.9990441520. Note that the first 3 decimals are identical.

It can be divided in two parts, 7122 and 206409, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 7122206409 in words is "seven billion, one hundred twenty-two million, two hundred six thousand, four hundred nine".