2218881025 has 9 divisors (see below), whose sum is σ = 2751704553. Its totient is φ = 1774916400.

The previous prime is 2218881023. The next prime is 2218881029. The reversal of 2218881025 is 5201888122.

The square root of 2218881025 is 47105.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 220433409 + 1998447616 = 14847^2 + 44704^2 .

It is not a de Polignac number, because 2218881025 - 2¹ = 2218881023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218881023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 230815 + ... + 240235.

Almost surely, 2^2218881025 is an apocalyptic number.

2218881025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2218881025 is the 47105-th square number.

2218881025 is the 23553-rd centered octagonal number.

It is an amenable number.

2218881025 is a deficient number, since it is larger than the sum of its proper divisors (532823528).

2218881025 is an frugal number, since it uses more digits than its factorization.

2218881025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18852 (or 9426 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 37.

The cubic root of 2218881025 is about 1304.3015350911.

The spelling of 2218881025 in words is "two billion, two hundred eighteen million, eight hundred eighty-one thousand, twenty-five".