33520240161 has 24 divisors (see below), whose sum is σ = 51273335880. Its totient is φ = 21029400576.

The previous prime is 33520240099. The next prime is 33520240163. The reversal of 33520240161 is 16104202533.

It can be written as a sum of positive squares in 4 ways, for example, as 16427292561 + 17092947600 = 128169^2 + 130740^2 .

It is not a de Polignac number, because 33520240161 - 2¹¹ = 33520238113 is a prime.

It is a super-2 number, since 2×33520240161² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33520240163) 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 in 23 ways as a sum of consecutive naturals, for example, 1819645 + ... + 1837973.

It is an arithmetic number, because the mean of its divisors is an integer number (2136388995).

Almost surely, 2^33520240161 is an apocalyptic number.

It is an amenable number.

33520240161 is a deficient number, since it is larger than the sum of its proper divisors (17753095719).

33520240161 is a wasteful number, since it uses less digits than its factorization.

33520240161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30305 (or 30302 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 33520240161 its reverse (16104202533), we get a palindrome (49624442694).

The spelling of 33520240161 in words is "thirty-three billion, five hundred twenty million, two hundred forty thousand, one hundred sixty-one".