305420243331 has 32 divisors (see below), whose sum is σ = 489938268160. Its totient is φ = 165326399136.

The previous prime is 305420243321. The next prime is 305420243333. The reversal of 305420243331 is 133342024503.

It is not a de Polignac number, because 305420243331 - 2²² = 305416049027 is a prime.

It is a super-2 number, since 2×305420243331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (305420243333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6274770 + ... + 6323256.

It is an arithmetic number, because the mean of its divisors is an integer number (15310570880).

Almost surely, 2^305420243331 is an apocalyptic number.

305420243331 is a deficient number, since it is larger than the sum of its proper divisors (184518024829).

305420243331 is a wasteful number, since it uses less digits than its factorization.

305420243331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64303.

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 305420243331 its reverse (133342024503), we get a palindrome (438762267834).

The spelling of 305420243331 in words is "three hundred five billion, four hundred twenty million, two hundred forty-three thousand, three hundred thirty-one".