7218441800 has 24 divisors (see below), whose sum is σ = 16782877650. Its totient is φ = 2887376640.

The previous prime is 7218441787. The next prime is 7218441803. The reversal of 7218441800 is 81448127.

It can be written as a sum of positive squares in 3 ways, for example, as 3911501764 + 3306940036 = 62542^2 + 57506^2 .

It is not an unprimeable number, because it can be changed into a prime (7218441803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18045905 + ... + 18046304.

Almost surely, 2^7218441800 is an apocalyptic number.

It is an amenable number.

7218441800 is an abundant number, since it is smaller than the sum of its proper divisors (9564435850).

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

7218441800 is a wasteful number, since it uses less digits than its factorization.

7218441800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36092225 (or 36092216 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 7218441800 is about 84961.4135946431. The cubic root of 7218441800 is about 1932.6260082613.

Adding to 7218441800 its reverse (81448127), we get a palindrome (7299889927).

The spelling of 7218441800 in words is "seven billion, two hundred eighteen million, four hundred forty-one thousand, eight hundred".