4720217231 has 2 divisors, whose sum is σ = 4720217232. Its totient is φ = 4720217230.

The previous prime is 4720217213. The next prime is 4720217233. The reversal of 4720217231 is 1327120274.

Together with previous prime (4720217213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4720217231 - 2⁶ = 4720217167 is a prime.

It is a super-2 number, since 2×4720217231² = 44560901415658614722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4720217233, 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 = 4720217194 and 4720217203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4720217233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360108615 + 2360108616.

It is an arithmetic number, because the mean of its divisors is an integer number (2360108616).

Almost surely, 2^4720217231 is an apocalyptic number.

4720217231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4720217231 is an equidigital number, since it uses as much as digits as its factorization.

4720217231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 4720217231 is about 68703.8370908059. The cubic root of 4720217231 is about 1677.4670388268.

The spelling of 4720217231 in words is "four billion, seven hundred twenty million, two hundred seventeen thousand, two hundred thirty-one".