245725213 has 2 divisors, whose sum is σ = 245725214. Its totient is φ = 245725212.

The previous prime is 245725211. The next prime is 245725229. The reversal of 245725213 is 312527542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186404409 + 59320804 = 13653^2 + 7702^2 .

It is a cyclic number.

It is not a de Polignac number, because 245725213 - 2¹ = 245725211 is a prime.

Together with 245725211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245725211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122862606 + 122862607.

It is an arithmetic number, because the mean of its divisors is an integer number (122862607).

Almost surely, 2^245725213 is an apocalyptic number.

It is an amenable number.

245725213 is a deficient number, since it is larger than the sum of its proper divisors (1).

245725213 is an equidigital number, since it uses as much as digits as its factorization.

245725213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 245725213 is about 15675.6248041346. The cubic root of 245725213 is about 626.3492668303.

The spelling of 245725213 in words is "two hundred forty-five million, seven hundred twenty-five thousand, two hundred thirteen".