53531613 has 6 divisors (see below), whose sum is σ = 77323454. Its totient is φ = 35687736.

The previous prime is 53531581. The next prime is 53531629. The reversal of 53531613 is 31613535.

It can be written as a sum of positive squares in only one way, i.e., 29354724 + 24176889 = 5418^2 + 4917^2 .

It is not a de Polignac number, because 53531613 - 2⁵ = 53531581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53531633) 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, 2973970 + ... + 2973987.

Almost surely, 2^53531613 is an apocalyptic number.

It is an amenable number.

53531613 is a deficient number, since it is larger than the sum of its proper divisors (23791841).

53531613 is a wasteful number, since it uses less digits than its factorization.

53531613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5947963 (or 5947960 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 53531613 is about 7316.5301202141. The cubic root of 53531613 is about 376.8803054458.

The spelling of 53531613 in words is "fifty-three million, five hundred thirty-one thousand, six hundred thirteen".