2218280631 has 16 divisors (see below), whose sum is σ = 3386014464. Its totient is φ = 1265422464.

The previous prime is 2218280611. The next prime is 2218280639. The reversal of 2218280631 is 1360828122.

It is not a de Polignac number, because 2218280631 - 2⁷ = 2218280503 is a prime.

It is a super-2 number, since 2×2218280631² = 9841537915739516322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2218280592 and 2218280601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218280639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77650 + ... + 102303.

It is an arithmetic number, because the mean of its divisors is an integer number (211625904).

Almost surely, 2^2218280631 is an apocalyptic number.

2218280631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2218280631 is a deficient number, since it is larger than the sum of its proper divisors (1167733833).

2218280631 is a wasteful number, since it uses less digits than its factorization.

2218280631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180550.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 2218280631 is about 47098.6266360284. The cubic root of 2218280631 is about 1304.1838833785.

The spelling of 2218280631 in words is "two billion, two hundred eighteen million, two hundred eighty thousand, six hundred thirty-one".