245352581 has 2 divisors, whose sum is σ = 245352582. Its totient is φ = 245352580.

The previous prime is 245352571. The next prime is 245352589. The reversal of 245352581 is 185253542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140801956 + 104550625 = 11866^2 + 10225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245352581 is a prime.

It is a super-2 number, since 2×245352581² = 120395778006723122, 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 (245352589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122676290 + 122676291.

It is an arithmetic number, because the mean of its divisors is an integer number (122676291).

Almost surely, 2^245352581 is an apocalyptic number.

It is an amenable number.

245352581 is a deficient number, since it is larger than the sum of its proper divisors (1).

245352581 is an equidigital number, since it uses as much as digits as its factorization.

245352581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 35.

The square root of 245352581 is about 15663.7345802334. The cubic root of 245352581 is about 626.0324958378.

The spelling of 245352581 in words is "two hundred forty-five million, three hundred fifty-two thousand, five hundred eighty-one".