53440000133 has 4 divisors (see below), whose sum is σ = 57550769388. Its totient is φ = 49329230880.

The previous prime is 53440000129. The next prime is 53440000139. The reversal of 53440000133 is 33100004435.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17291724004 + 36148276129 = 131498^2 + 190127^2 .

It is a cyclic number.

It is not a de Polignac number, because 53440000133 - 2² = 53440000129 is a prime.

It is a super-2 number, since 2×53440000133² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53440000099 and 53440000108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440000139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2055384608 + ... + 2055384633.

It is an arithmetic number, because the mean of its divisors is an integer number (14387692347).

Almost surely, 2^53440000133 is an apocalyptic number.

It is an amenable number.

53440000133 is a deficient number, since it is larger than the sum of its proper divisors (4110769255).

53440000133 is a wasteful number, since it uses less digits than its factorization.

53440000133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110769254.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 53440000133 its reverse (33100004435), we get a palindrome (86540004568).

The spelling of 53440000133 in words is "fifty-three billion, four hundred forty million, one hundred thirty-three", and thus it is an aban number.