622217231 has 2 divisors, whose sum is σ = 622217232. Its totient is φ = 622217230.

The previous prime is 622217207. The next prime is 622217249. The reversal of 622217231 is 132712226.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 622217231 - 2¹⁰ = 622216207 is a prime.

It is a super-2 number, since 2×622217231² = 774308565106614722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 622217231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622217201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311108615 + 311108616.

It is an arithmetic number, because the mean of its divisors is an integer number (311108616).

Almost surely, 2^622217231 is an apocalyptic number.

622217231 is a deficient number, since it is larger than the sum of its proper divisors (1).

622217231 is an equidigital number, since it uses as much as digits as its factorization.

622217231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 622217231 is about 24944.2825312736. The cubic root of 622217231 is about 853.7171605849.

Adding to 622217231 its reverse (132712226), we get a palindrome (754929457).

The spelling of 622217231 in words is "six hundred twenty-two million, two hundred seventeen thousand, two hundred thirty-one".