220218788 has 6 divisors (see below), whose sum is σ = 385382886. Its totient is φ = 110109392.

The previous prime is 220218787. The next prime is 220218839. The reversal of 220218788 is 887812022.

It can be written as a sum of positive squares in only one way, i.e., 214563904 + 5654884 = 14648^2 + 2378^2 .

It is not an unprimeable number, because it can be changed into a prime (220218787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527345 + ... + 27527352.

It is an arithmetic number, because the mean of its divisors is an integer number (64230481).

Almost surely, 2^220218788 is an apocalyptic number.

It is an amenable number.

220218788 is a deficient number, since it is larger than the sum of its proper divisors (165164098).

220218788 is a wasteful number, since it uses less digits than its factorization.

220218788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55054701 (or 55054699 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 220218788 is about 14839.7704834003. The cubic root of 220218788 is about 603.8811258243.

The spelling of 220218788 in words is "two hundred twenty million, two hundred eighteen thousand, seven hundred eighty-eight".