245120231 has 2 divisors, whose sum is σ = 245120232. Its totient is φ = 245120230.

The previous prime is 245120221. The next prime is 245120243. The reversal of 245120231 is 132021542.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245120231 is a prime.

It is a super-2 number, since 2×245120231² = 120167855290986722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245120221) 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, 122560115 + 122560116.

It is an arithmetic number, because the mean of its divisors is an integer number (122560116).

Almost surely, 2^245120231 is an apocalyptic number.

245120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

245120231 is an equidigital number, since it uses as much as digits as its factorization.

245120231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 245120231 is about 15656.3160098409. The cubic root of 245120231 is about 625.8348148914.

Adding to 245120231 its reverse (132021542), we get a palindrome (377141773).

The spelling of 245120231 in words is "two hundred forty-five million, one hundred twenty thousand, two hundred thirty-one".