305122231 has 2 divisors, whose sum is σ = 305122232. Its totient is φ = 305122230.

The previous prime is 305122201. The next prime is 305122241. The reversal of 305122231 is 132221503.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305122231 - 2¹³ = 305114039 is a prime.

It is a super-2 number, since 2×305122231² = 186199151700834722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 305122199 and 305122208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305122201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152561115 + 152561116.

It is an arithmetic number, because the mean of its divisors is an integer number (152561116).

Almost surely, 2^305122231 is an apocalyptic number.

305122231 is a deficient number, since it is larger than the sum of its proper divisors (1).

305122231 is an equidigital number, since it uses as much as digits as its factorization.

305122231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 305122231 is about 17467.7483093844. The cubic root of 305122231 is about 673.2214585285.

Adding to 305122231 its reverse (132221503), we get a palindrome (437343734).

The spelling of 305122231 in words is "three hundred five million, one hundred twenty-two thousand, two hundred thirty-one".