220001264 has 20 divisors (see below), whose sum is σ = 487145904. Its totient is φ = 94286208.

The previous prime is 220001261. The next prime is 220001273. The reversal of 220001264 is 462100022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982037 + ... + 982260.

Almost surely, 2^220001264 is an apocalyptic number.

It is an amenable number.

220001264 is an abundant number, since it is smaller than the sum of its proper divisors (267144640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220001264 is a wasteful number, since it uses less digits than its factorization.

220001264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964312 (or 1964306 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220001264 is about 14832.4395835614. The cubic root of 220001264 is about 603.6822298183.

Adding to 220001264 its reverse (462100022), we get a palindrome (682101286).

The spelling of 220001264 in words is "two hundred twenty million, one thousand, two hundred sixty-four".