245351221 has 8 divisors (see below), whose sum is σ = 249260544. Its totient is φ = 241454640.

The previous prime is 245351219. The next prime is 245351243. The reversal of 245351221 is 122153542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245351221 - 2¹ = 245351219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245351251) 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 in 7 ways as a sum of consecutive naturals, for example, 40251 + ... + 45943.

It is an arithmetic number, because the mean of its divisors is an integer number (31157568).

Almost surely, 2^245351221 is an apocalyptic number.

It is an amenable number.

245351221 is a deficient number, since it is larger than the sum of its proper divisors (3909323).

245351221 is an equidigital number, since it uses as much as digits as its factorization.

245351221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371.

The product of its digits is 2400, while the sum is 25.

The square root of 245351221 is about 15663.6911677931. The cubic root of 245351221 is about 626.0313391273.

The spelling of 245351221 in words is "two hundred forty-five million, three hundred fifty-one thousand, two hundred twenty-one".