53615 has 4 divisors (see below), whose sum is σ = 64344. Its totient is φ = 42888.

The previous prime is 53611. The next prime is 53617. The reversal of 53615 is 51635.

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

It is a cyclic number.

It is not a de Polignac number, because 53615 - 2² = 53611 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53611) 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, 5357 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (16086).

2⁵³⁶¹⁵ is an apocalyptic number.

53615 is a deficient number, since it is larger than the sum of its proper divisors (10729).

53615 is a wasteful number, since it uses less digits than its factorization.

53615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10728.

The product of its digits is 450, while the sum is 20.

The square root of 53615 is about 231.5491308556. The cubic root of 53615 is about 37.7075894633.

Adding to 53615 its sum of digits (20), we get a palindrome (53635).

The spelling of 53615 in words is "fifty-three thousand, six hundred fifteen".