220651388 has 6 divisors (see below), whose sum is σ = 386139936. Its totient is φ = 110325692.

The previous prime is 220651363. The next prime is 220651393. The reversal of 220651388 is 883156022.

220651388 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27581420 + ... + 27581427.

It is an arithmetic number, because the mean of its divisors is an integer number (64356656).

Almost surely, 2^220651388 is an apocalyptic number.

It is an amenable number.

220651388 is a deficient number, since it is larger than the sum of its proper divisors (165488548).

220651388 is a wasteful number, since it uses less digits than its factorization.

220651388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55162851 (or 55162849 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 220651388 is about 14854.3390293880. The cubic root of 220651388 is about 604.2762905658.

The spelling of 220651388 in words is "two hundred twenty million, six hundred fifty-one thousand, three hundred eighty-eight".