245155523321 has 2 divisors, whose sum is σ = 245155523322. Its totient is φ = 245155523320.

The previous prime is 245155523281. The next prime is 245155523381. The reversal of 245155523321 is 123325551542.

245155523321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177001111225 + 68154412096 = 420715^2 + 261064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245155523321 is a prime.

It is a super-2 number, since 2×245155523321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245155523381) 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 as a sum of consecutive naturals, namely, 122577761660 + 122577761661.

It is an arithmetic number, because the mean of its divisors is an integer number (122577761661).

Almost surely, 2^245155523321 is an apocalyptic number.

It is an amenable number.

245155523321 is a deficient number, since it is larger than the sum of its proper divisors (1).

245155523321 is an equidigital number, since it uses as much as digits as its factorization.

245155523321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180000, while the sum is 38.

The spelling of 245155523321 in words is "two hundred forty-five billion, one hundred fifty-five million, five hundred twenty-three thousand, three hundred twenty-one".