2220724642 has 8 divisors (see below), whose sum is σ = 3385695132. Its totient is φ = 1092159600.

The previous prime is 2220724609. The next prime is 2220724679. The reversal of 2220724642 is 2464270222.

It can be written as a sum of positive squares in 2 ways, for example, as 1450162561 + 770562081 = 38081^2 + 27759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9101209 + ... + 9101452.

Almost surely, 2^2220724642 is an apocalyptic number.

2220724642 is a deficient number, since it is larger than the sum of its proper divisors (1164970490).

2220724642 is a wasteful number, since it uses less digits than its factorization.

2220724642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18202724.

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 2220724642 is about 47124.5651651026. The cubic root of 2220724642 is about 1304.6626730969.

Adding to 2220724642 its reverse (2464270222), we get a palindrome (4684994864).

The spelling of 2220724642 in words is "two billion, two hundred twenty million, seven hundred twenty-four thousand, six hundred forty-two".