53117661 has 8 divisors (see below), whose sum is σ = 72330624. Its totient is φ = 34658240.

The previous prime is 53117657. The next prime is 53117693. The reversal of 53117661 is 16671135.

53117661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53117661 - 2² = 53117657 is a prime.

It is a super-2 number, since 2×53117661² = 5642971820221842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53117611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188220 + ... + 188501.

It is an arithmetic number, because the mean of its divisors is an integer number (9041328).

Almost surely, 2^53117661 is an apocalyptic number.

It is an amenable number.

53117661 is a deficient number, since it is larger than the sum of its proper divisors (19212963).

53117661 is a wasteful number, since it uses less digits than its factorization.

53117661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376771.

The product of its digits is 3780, while the sum is 30.

The square root of 53117661 is about 7288.1863999215. The cubic root of 53117661 is about 375.9063374860.

Adding to 53117661 its reverse (16671135), we get a palindrome (69788796).

The spelling of 53117661 in words is "fifty-three million, one hundred seventeen thousand, six hundred sixty-one".