7219994509 has 32 divisors (see below), whose sum is σ = 9409568000. Its totient is φ = 5411644992.

The previous prime is 7219994497. The next prime is 7219994513. The reversal of 7219994509 is 9054999127.

It is not a de Polignac number, because 7219994509 - 2⁵ = 7219994477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7219994509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7219994539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279847 + ... + 304555.

It is an arithmetic number, because the mean of its divisors is an integer number (294049000).

Almost surely, 2^7219994509 is an apocalyptic number.

It is an amenable number.

7219994509 is a deficient number, since it is larger than the sum of its proper divisors (2189573491).

7219994509 is a wasteful number, since it uses less digits than its factorization.

7219994509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24774 (or 24748 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 55.

The square root of 7219994509 is about 84970.5508338036. The cubic root of 7219994509 is about 1932.7645695901.

The spelling of 7219994509 in words is "seven billion, two hundred nineteen million, nine hundred ninety-four thousand, five hundred nine".