2218893557 has 4 divisors (see below), whose sum is σ = 2234856960. Its totient is φ = 2202930156.

The previous prime is 2218893517. The next prime is 2218893563. The reversal of 2218893557 is 7553988122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7553988122 = 2 ⋅3776994061.

It is a cyclic number.

It is not a de Polignac number, because 2218893557 - 2⁸ = 2218893301 is a prime.

It is a super-2 number, since 2×2218893557² = 9846977234592224498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218893517) 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, 7981493 + ... + 7981770.

It is an arithmetic number, because the mean of its divisors is an integer number (558714240).

Almost surely, 2^2218893557 is an apocalyptic number.

It is an amenable number.

2218893557 is a deficient number, since it is larger than the sum of its proper divisors (15963403).

2218893557 is a wasteful number, since it uses less digits than its factorization.

2218893557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15963402.

The product of its digits is 1209600, while the sum is 50.

The square root of 2218893557 is about 47105.1330217844. The cubic root of 2218893557 is about 1304.3039906044.

The spelling of 2218893557 in words is "two billion, two hundred eighteen million, eight hundred ninety-three thousand, five hundred fifty-seven".