218044031 has 2 divisors, whose sum is σ = 218044032. Its totient is φ = 218044030.

The previous prime is 218043983. The next prime is 218044033. The reversal of 218044031 is 130440812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218044031 - 2⁶ = 218043967 is a prime.

It is a super-2 number, since 2×218044031² = 95086398909457922, which contains 22 as substring.

Together with 218044033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 218043988 and 218044006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218044033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109022015 + 109022016.

It is an arithmetic number, because the mean of its divisors is an integer number (109022016).

Almost surely, 2^218044031 is an apocalyptic number.

218044031 is a deficient number, since it is larger than the sum of its proper divisors (1).

218044031 is an equidigital number, since it uses as much as digits as its factorization.

218044031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 218044031 is about 14766.3140627578. The cubic root of 218044031 is about 601.8866824601.

Adding to 218044031 its reverse (130440812), we get a palindrome (348484843).

The spelling of 218044031 in words is "two hundred eighteen million, forty-four thousand, thirty-one".