7251122409 has 12 divisors (see below), whose sum is σ = 9681898416. Its totient is φ = 4827222232.

The previous prime is 7251122327. The next prime is 7251122413. The reversal of 7251122409 is 9042211527.

It is not a de Polignac number, because 7251122409 - 2⁹ = 7251121897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7251122409.

It is not an unprimeable number, because it can be changed into a prime (7251122419) 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, 4056814 + ... + 4058600.

It is an arithmetic number, because the mean of its divisors is an integer number (806824868).

Almost surely, 2^7251122409 is an apocalyptic number.

It is an amenable number.

7251122409 is a deficient number, since it is larger than the sum of its proper divisors (2430776007).

7251122409 is an equidigital number, since it uses as much as digits as its factorization.

7251122409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 7251122409 is about 85153.5225871484. The cubic root of 7251122409 is about 1935.5381934769.

The spelling of 7251122409 in words is "seven billion, two hundred fifty-one million, one hundred twenty-two thousand, four hundred nine".