53721376 has 48 divisors (see below), whose sum is σ = 112783104. Its totient is φ = 25129984.

The previous prime is 53721361. The next prime is 53721391. The reversal of 53721376 is 67312735.

It is an interprime number because it is at equal distance from previous prime (53721361) and next prime (53721391).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33816 + ... + 35368.

It is an arithmetic number, because the mean of its divisors is an integer number (2349648).

Almost surely, 2^53721376 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 53721376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56391552).

53721376 is an abundant number, since it is smaller than the sum of its proper divisors (59061728).

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

53721376 is a wasteful number, since it uses less digits than its factorization.

53721376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1625 counting only the distinct ones).

The product of its digits is 26460, while the sum is 34.

The square root of 53721376 is about 7329.4867487431. The cubic root of 53721376 is about 377.3251117450.

It can be divided in two parts, 537213 and 76, that added together give a square (537289 = 733²).

The spelling of 53721376 in words is "fifty-three million, seven hundred twenty-one thousand, three hundred seventy-six".