53515616 has 96 divisors (see below), whose sum is σ = 135136512. Its totient is φ = 20252160.

The previous prime is 53515613. The next prime is 53515639. The reversal of 53515616 is 61651535.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53515613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90875 + ... + 91461.

It is an arithmetic number, because the mean of its divisors is an integer number (1407672).

Almost surely, 2^53515616 is an apocalyptic number.

53515616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53515616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67568256).

53515616 is an abundant number, since it is smaller than the sum of its proper divisors (81620896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53515616 is a wasteful number, since it uses less digits than its factorization.

53515616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 644 counting only the distinct ones).

The product of its digits is 13500, while the sum is 32.

The square root of 53515616 is about 7315.4368290622. The cubic root of 53515616 is about 376.8427603109.

The spelling of 53515616 in words is "fifty-three million, five hundred fifteen thousand, six hundred sixteen".