305520232081 has 16 divisors (see below), whose sum is σ = 310834497600. Its totient is φ = 300260271168.

The previous prime is 305520232079. The next prime is 305520232091. The reversal of 305520232081 is 180232025503.

It is a cyclic number.

It is not a de Polignac number, because 305520232081 - 2¹ = 305520232079 is a prime.

It is a super-2 number, since 2×305520232081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305520232091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7726146 + ... + 7765588.

It is an arithmetic number, because the mean of its divisors is an integer number (19427156100).

Almost surely, 2^305520232081 is an apocalyptic number.

It is an amenable number.

305520232081 is a deficient number, since it is larger than the sum of its proper divisors (5314265519).

305520232081 is a wasteful number, since it uses less digits than its factorization.

305520232081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40128.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 305520232081 its reverse (180232025503), we get a palindrome (485752257584).

The spelling of 305520232081 in words is "three hundred five billion, five hundred twenty million, two hundred thirty-two thousand, eighty-one".