7213345840 has 20 divisors (see below), whose sum is σ = 16771029264. Its totient is φ = 2885338304.

The previous prime is 7213345817. The next prime is 7213345849. The reversal of 7213345840 is 485433127.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 7213345840.

It is not an unprimeable number, because it can be changed into a prime (7213345849) 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, 45083332 + ... + 45083491.

Almost surely, 2^7213345840 is an apocalyptic number.

It is an amenable number.

7213345840 is an abundant number, since it is smaller than the sum of its proper divisors (9557683424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7213345840 is a wasteful number, since it uses less digits than its factorization.

7213345840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90166836 (or 90166830 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 7213345840 is about 84931.4184504180. The cubic root of 7213345840 is about 1932.1711130731.

Adding to 7213345840 its reverse (485433127), we get a palindrome (7698778967).

The spelling of 7213345840 in words is "seven billion, two hundred thirteen million, three hundred forty-five thousand, eight hundred forty".