2218948531 has 4 divisors (see below), whose sum is σ = 2219454864. Its totient is φ = 2218442200.

The previous prime is 2218948513. The next prime is 2218948549. The reversal of 2218948531 is 1358498122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2218948513) and next prime (2218948549).

It is a cyclic number.

It is not a de Polignac number, because 2218948531 - 2⁵ = 2218948499 is a prime.

It is a super-2 number, since 2×2218948531² = 9847465166454115922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2218940531) 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, 246535 + ... + 255376.

It is an arithmetic number, because the mean of its divisors is an integer number (554863716).

Almost surely, 2^2218948531 is an apocalyptic number.

2218948531 is a deficient number, since it is larger than the sum of its proper divisors (506333).

2218948531 is an equidigital number, since it uses as much as digits as its factorization.

2218948531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506332.

The product of its digits is 138240, while the sum is 43.

The square root of 2218948531 is about 47105.7165426873. The cubic root of 2218948531 is about 1304.3147620713.

The spelling of 2218948531 in words is "two billion, two hundred eighteen million, nine hundred forty-eight thousand, five hundred thirty-one".