2201815642 has 16 divisors (see below), whose sum is σ = 3557703240. Its totient is φ = 1015958592.

The previous prime is 2201815621. The next prime is 2201815669. The reversal of 2201815642 is 2465181022.

It can be written as a sum of positive squares in 4 ways, for example, as 1940314401 + 261501241 = 44049^2 + 16171^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120784 + ... + 137812.

Almost surely, 2^2201815642 is an apocalyptic number.

2201815642 is a deficient number, since it is larger than the sum of its proper divisors (1355887598).

2201815642 is a wasteful number, since it uses less digits than its factorization.

2201815642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22017.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2201815642 is about 46923.5084152922. The cubic root of 2201815642 is about 1300.9491376296.

Adding to 2201815642 its reverse (2465181022), we get a palindrome (4666996664).

The spelling of 2201815642 in words is "two billion, two hundred one million, eight hundred fifteen thousand, six hundred forty-two".