305445431221 has 6 divisors (see below), whose sum is σ = 355314073110. Its totient is φ = 261810369576.

The previous prime is 305445431209. The next prime is 305445431279. The reversal of 305445431221 is 122134544503.

It can be written as a sum of positive squares in only one way, i.e., 165205667025 + 140239764196 = 406455^2 + 374486^2 .

It is not a de Polignac number, because 305445431221 - 2¹³ = 305445423029 is a prime.

It is a super-2 number, since 2×305445431221² (a number of 24 digits) contains 22 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 (305445431201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3116790066 + ... + 3116790163.

It is an arithmetic number, because the mean of its divisors is an integer number (59219012185).

Almost surely, 2^305445431221 is an apocalyptic number.

It is an amenable number.

305445431221 is a deficient number, since it is larger than the sum of its proper divisors (49868641889).

305445431221 is an equidigital number, since it uses as much as digits as its factorization.

305445431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6233580243 (or 6233580236 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 305445431221 its reverse (122134544503), we get a palindrome (427579975724).

The spelling of 305445431221 in words is "three hundred five billion, four hundred forty-five million, four hundred thirty-one thousand, two hundred twenty-one".