53991696 has 80 divisors (see below), whose sum is σ = 153115200. Its totient is φ = 16258560.

The previous prime is 53991661. The next prime is 53991697. The reversal of 53991696 is 69619935.

53991696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×53991696³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (53991697) 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 15 ways as a sum of consecutive naturals, for example, 154530 + ... + 154878.

It is an arithmetic number, because the mean of its divisors is an integer number (1913940).

Almost surely, 2^53991696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53991696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76557600).

53991696 is an abundant number, since it is smaller than the sum of its proper divisors (99123504).

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

53991696 is a wasteful number, since it uses less digits than its factorization.

53991696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 658 counting only the distinct ones).

The product of its digits is 393660, while the sum is 48.

The square root of 53991696 is about 7347.9041909921. The cubic root of 53991696 is about 377.9569391893.

It can be divided in two parts, 539 and 91696, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 53991696 in words is "fifty-three million, nine hundred ninety-one thousand, six hundred ninety-six".