245431412221 has 2 divisors, whose sum is σ = 245431412222. Its totient is φ = 245431412220.

The previous prime is 245431412167. The next prime is 245431412273. The reversal of 245431412221 is 122214134542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156725724996 + 88705687225 = 395886^2 + 297835^2 .

It is a cyclic number.

It is not a de Polignac number, because 245431412221 - 2¹¹ = 245431410173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245431412621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122715706110 + 122715706111.

It is an arithmetic number, because the mean of its divisors is an integer number (122715706111).

Almost surely, 2^245431412221 is an apocalyptic number.

It is an amenable number.

245431412221 is a deficient number, since it is larger than the sum of its proper divisors (1).

245431412221 is an equidigital number, since it uses as much as digits as its factorization.

245431412221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 31.

Adding to 245431412221 its reverse (122214134542), we get a palindrome (367645546763).

The spelling of 245431412221 in words is "two hundred forty-five billion, four hundred thirty-one million, four hundred twelve thousand, two hundred twenty-one".