2215420644 has 24 divisors (see below), whose sum is σ = 5240129440. Its totient is φ = 728357184.

The previous prime is 2215420607. The next prime is 2215420657. The reversal of 2215420644 is 4460245122.

It is a super-2 number, since 2×2215420644² = 9816177259722749472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1263634 + ... + 1265385.

Almost surely, 2^2215420644 is an apocalyptic number.

It is an amenable number.

2215420644 is an abundant number, since it is smaller than the sum of its proper divisors (3024708796).

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

2215420644 is a wasteful number, since it uses less digits than its factorization.

2215420644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529099 (or 2529097 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 2215420644 is about 47068.2551620516. The cubic root of 2215420644 is about 1303.6231558443.

Adding to 2215420644 its reverse (4460245122), we get a palindrome (6675665766).

The spelling of 2215420644 in words is "two billion, two hundred fifteen million, four hundred twenty thousand, six hundred forty-four".