245321231 has 2 divisors, whose sum is σ = 245321232. Its totient is φ = 245321230.

The previous prime is 245321227. The next prime is 245321257. The reversal of 245321231 is 132123542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245321231 - 2² = 245321227 is a prime.

It is a super-2 number, since 2×245321231² = 120365012758710722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245321197 and 245321206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245321281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122660615 + 122660616.

It is an arithmetic number, because the mean of its divisors is an integer number (122660616).

Almost surely, 2^245321231 is an apocalyptic number.

245321231 is a deficient number, since it is larger than the sum of its proper divisors (1).

245321231 is an equidigital number, since it uses as much as digits as its factorization.

245321231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 245321231 is about 15662.7338290606. The cubic root of 245321231 is about 626.0058308718.

Adding to 245321231 its reverse (132123542), we get a palindrome (377444773).

The spelling of 245321231 in words is "two hundred forty-five million, three hundred twenty-one thousand, two hundred thirty-one".