245928221 has 8 divisors (see below), whose sum is σ = 306611904. Its totient is φ = 191632320.

The previous prime is 245928211. The next prime is 245928227. The reversal of 245928221 is 122829542.

It is a happy number.

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

It is not a de Polignac number, because 245928221 - 2⁶ = 245928157 is a prime.

It is a super-3 number, since 3×245928221³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245928227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596860 + ... + 1597013.

It is an arithmetic number, because the mean of its divisors is an integer number (38326488).

Almost surely, 2^245928221 is an apocalyptic number.

It is an amenable number.

245928221 is a deficient number, since it is larger than the sum of its proper divisors (60683683).

245928221 is a wasteful number, since it uses less digits than its factorization.

245928221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193891.

The product of its digits is 23040, while the sum is 35.

The square root of 245928221 is about 15682.0987434718. The cubic root of 245928221 is about 626.5217072975.

The spelling of 245928221 in words is "two hundred forty-five million, nine hundred twenty-eight thousand, two hundred twenty-one".