245763221 has 12 divisors (see below), whose sum is σ = 271945632. Its totient is φ = 221925000.

The previous prime is 245763191. The next prime is 245763223. The reversal of 245763221 is 122367542.

It is a de Polignac number, because none of the positive numbers 2^k-245763221 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 (245763223) 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 11 ways as a sum of consecutive naturals, for example, 11546 + ... + 24996.

It is an arithmetic number, because the mean of its divisors is an integer number (22662136).

Almost surely, 2^245763221 is an apocalyptic number.

It is an amenable number.

245763221 is a deficient number, since it is larger than the sum of its proper divisors (26182411).

245763221 is a wasteful number, since it uses less digits than its factorization.

245763221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13624 (or 13613 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 245763221 is about 15676.8370853307. The cubic root of 245763221 is about 626.3815590743.

The spelling of 245763221 in words is "two hundred forty-five million, seven hundred sixty-three thousand, two hundred twenty-one".