245331321 has 4 divisors (see below), whose sum is σ = 327108432. Its totient is φ = 163554212.

The previous prime is 245331313. The next prime is 245331337. The reversal of 245331321 is 123133542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245331321 - 2³ = 245331313 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 245331291 and 245331300.

It is not an unprimeable number, because it can be changed into a prime (245331221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40888551 + ... + 40888556.

It is an arithmetic number, because the mean of its divisors is an integer number (81777108).

Almost surely, 2^245331321 is an apocalyptic number.

It is an amenable number.

245331321 is a deficient number, since it is larger than the sum of its proper divisors (81777111).

245331321 is an equidigital number, since it uses as much as digits as its factorization.

245331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81777110.

The product of its digits is 2160, while the sum is 24.

The square root of 245331321 is about 15663.0559278833. The cubic root of 245331321 is about 626.0144132411.

Adding to 245331321 its reverse (123133542), we get a palindrome (368464863).

The spelling of 245331321 in words is "two hundred forty-five million, three hundred thirty-one thousand, three hundred twenty-one".