220775643 has 24 divisors (see below), whose sum is σ = 363018240. Its totient is φ = 127984560.

The previous prime is 220775641. The next prime is 220775647. The reversal of 220775643 is 346577022.

It is a happy number.

220775643 is a `hidden beast` number, since 2 + 2 + 0 + 7 + 7 + 5 + 643 = 666.

220775643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220775643 - 2¹ = 220775641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220775598 and 220775607.

It is not an unprimeable number, because it can be changed into a prime (220775641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46203 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (15125760).

Almost surely, 2^220775643 is an apocalyptic number.

220775643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

220775643 is a deficient number, since it is larger than the sum of its proper divisors (142242597).

220775643 is a wasteful number, since it uses less digits than its factorization.

220775643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96999 (or 96996 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 220775643 is about 14858.5208887022. The cubic root of 220775643 is about 604.3896976036.

The spelling of 220775643 in words is "two hundred twenty million, seven hundred seventy-five thousand, six hundred forty-three".