53315752420 has 144 divisors (see below), whose sum is σ = 132264861120. Its totient is φ = 17998046976.

The previous prime is 53315752381. The next prime is 53315752423. The reversal of 53315752420 is 2425751335.

It is a happy number.

It is a super-2 number, since 2×53315752420² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53315752420.

It is not an unprimeable number, because it can be changed into a prime (53315752423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18139311 + ... + 18142249.

It is an arithmetic number, because the mean of its divisors is an integer number (918505980).

Almost surely, 2^53315752420 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 53315752420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66132430560).

53315752420 is an abundant number, since it is smaller than the sum of its proper divisors (78949108700).

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

53315752420 is a wasteful number, since it uses less digits than its factorization.

53315752420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242 (or 3233 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 53315752420 in words is "fifty-three billion, three hundred fifteen million, seven hundred fifty-two thousand, four hundred twenty".