2218553672 has 8 divisors (see below), whose sum is σ = 4159788150. Its totient is φ = 1109276832.

The previous prime is 2218553671. The next prime is 2218553699. The reversal of 2218553672 is 2763558122.

It can be written as a sum of positive squares in only one way, i.e., 1212014596 + 1006539076 = 34814^2 + 31726^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2218553671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138659597 + ... + 138659612.

Almost surely, 2^2218553672 is an apocalyptic number.

It is an amenable number.

2218553672 is a deficient number, since it is larger than the sum of its proper divisors (1941234478).

2218553672 is a wasteful number, since it uses less digits than its factorization.

2218553672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277319215 (or 277319211 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 2218553672 is about 47101.5251557739. The cubic root of 2218553672 is about 1304.2373904442.

It can be divided in two parts, 22185 and 53672, that added together give a palindrome (75857).

The spelling of 2218553672 in words is "two billion, two hundred eighteen million, five hundred fifty-three thousand, six hundred seventy-two".