53021360 has 80 divisors (see below), whose sum is σ = 142925376. Its totient is φ = 17915904.

The previous prime is 53021327. The next prime is 53021363. The reversal of 53021360 is 6312035.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×53021360² = 5622529232499200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (53021363) 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, 40232 + ... + 41528.

Almost surely, 2^53021360 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 53021360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71462688).

53021360 is an abundant number, since it is smaller than the sum of its proper divisors (89904016).

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

53021360 is a wasteful number, since it uses less digits than its factorization.

53021360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 53021360 is about 7281.5767523250. The cubic root of 53021360 is about 375.6790304457.

Adding to 53021360 its reverse (6312035), we get a palindrome (59333395).

The spelling of 53021360 in words is "fifty-three million, twenty-one thousand, three hundred sixty".