53621040 has 160 divisors (see below), whose sum is σ = 191059200. Its totient is φ = 12303360.

The previous prime is 53621011. The next prime is 53621063. The reversal of 53621040 is 4012635.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 53620998 and 53621016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49626 + ... + 50694.

It is an arithmetic number, because the mean of its divisors is an integer number (1194120).

Almost surely, 2^53621040 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 53621040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95529600).

53621040 is an abundant number, since it is smaller than the sum of its proper divisors (137438160).

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

53621040 is a wasteful number, since it uses less digits than its factorization.

53621040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 53621040 is about 7322.6388686047. The cubic root of 53621040 is about 377.0900539350.

Adding to 53621040 its reverse (4012635), we get a palindrome (57633675).

The spelling of 53621040 in words is "fifty-three million, six hundred twenty-one thousand, forty".