220963645 has 16 divisors (see below), whose sum is σ = 316212480. Its totient is φ = 144929664.

The previous prime is 220963643. The next prime is 220963651. The reversal of 220963645 is 546369022.

It is a cyclic number.

It is not a de Polignac number, because 220963645 - 2¹ = 220963643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220963643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136440 + ... + 138049.

It is an arithmetic number, because the mean of its divisors is an integer number (19763280).

Almost surely, 2^220963645 is an apocalyptic number.

It is an amenable number.

220963645 is a deficient number, since it is larger than the sum of its proper divisors (95248835).

220963645 is a wasteful number, since it uses less digits than its factorization.

220963645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274524.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 220963645 is about 14864.8459460568. The cubic root of 220963645 is about 604.5612054032.

The spelling of 220963645 in words is "two hundred twenty million, nine hundred sixty-three thousand, six hundred forty-five".