245625221 has 2 divisors, whose sum is σ = 245625222. Its totient is φ = 245625220.

The previous prime is 245625209. The next prime is 245625253. The reversal of 245625221 is 122526542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225420196 + 20205025 = 15014^2 + 4495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245625221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245685221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122812610 + 122812611.

It is an arithmetic number, because the mean of its divisors is an integer number (122812611).

Almost surely, 2^245625221 is an apocalyptic number.

It is an amenable number.

245625221 is a deficient number, since it is larger than the sum of its proper divisors (1).

245625221 is an equidigital number, since it uses as much as digits as its factorization.

245625221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 245625221 is about 15672.4350692546. The cubic root of 245625221 is about 626.2642960178.

The spelling of 245625221 in words is "two hundred forty-five million, six hundred twenty-five thousand, two hundred twenty-one".