7223781812 has 24 divisors (see below), whose sum is σ = 13746235776. Its totient is φ = 3301681248.

The previous prime is 7223781811. The next prime is 7223781827. The reversal of 7223781812 is 2181873227.

It is a self number, because there is not a number n which added to its sum of digits gives 7223781812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7223781811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669008 + ... + 679719.

It is an arithmetic number, because the mean of its divisors is an integer number (572759824).

Almost surely, 2^7223781812 is an apocalyptic number.

It is an amenable number.

7223781812 is a deficient number, since it is larger than the sum of its proper divisors (6522453964).

7223781812 is a wasteful number, since it uses less digits than its factorization.

7223781812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348847 (or 1348845 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 7223781812 is about 84992.8338861577. The cubic root of 7223781812 is about 1933.1024592982.

The spelling of 7223781812 in words is "seven billion, two hundred twenty-three million, seven hundred eighty-one thousand, eight hundred twelve".