220001156 has 24 divisors (see below), whose sum is σ = 388880856. Its totient is φ = 108898560.

The previous prime is 220001153. The next prime is 220001183. The reversal of 220001156 is 651100022.

220001156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12180100 + 207821056 = 3490^2 + 14416^2 .

It is not an unprimeable number, because it can be changed into a prime (220001153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200000 + ... + 201096.

It is an arithmetic number, because the mean of its divisors is an integer number (16203369).

Almost surely, 2^220001156 is an apocalyptic number.

It is an amenable number.

220001156 is a deficient number, since it is larger than the sum of its proper divisors (168879700).

220001156 is a wasteful number, since it uses less digits than its factorization.

220001156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 220001156 is about 14832.4359428922. The cubic root of 220001156 is about 603.6821310345.

Adding to 220001156 its reverse (651100022), we get a palindrome (871101178).

The spelling of 220001156 in words is "two hundred twenty million, one thousand, one hundred fifty-six".