53500013 has 6 divisors (see below), whose sum is σ = 62234766. Its totient is φ = 45857112.

The previous prime is 53499997. The next prime is 53500033. The reversal of 53500013 is 31000535.

It can be written as a sum of positive squares in only one way, i.e., 46199209 + 7300804 = 6797^2 + 2702^2 .

It is not a de Polignac number, because 53500013 - 2⁴ = 53499997 is a prime.

It is a super-3 number, since 3×53500013³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53499964 and 53500000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53500033) 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, 545870 + ... + 545967.

It is an arithmetic number, because the mean of its divisors is an integer number (10372461).

Almost surely, 2^53500013 is an apocalyptic number.

It is an amenable number.

53500013 is a deficient number, since it is larger than the sum of its proper divisors (8734753).

53500013 is a wasteful number, since it uses less digits than its factorization.

53500013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091851 (or 1091844 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 53500013 is about 7314.3703078255. The cubic root of 53500013 is about 376.8061326897.

Adding to 53500013 its reverse (31000535), we get a palindrome (84500548).

The spelling of 53500013 in words is "fifty-three million, five hundred thousand, thirteen".