53321604 has 144 divisors (see below), whose sum is σ = 155131200. Its totient is φ = 14187264.

The previous prime is 53321563. The next prime is 53321711. The reversal of 53321604 is 40612335.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 903727 + ... + 903785.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^53321604 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 53321604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77565600).

53321604 is an abundant number, since it is smaller than the sum of its proper divisors (101809596).

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

53321604 is a wasteful number, since it uses less digits than its factorization.

53321604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 53321604 is about 7302.1643366881. The cubic root of 53321604 is about 376.3868152161.

Adding to 53321604 its reverse (40612335), we get a palindrome (93933939).

The spelling of 53321604 in words is "fifty-three million, three hundred twenty-one thousand, six hundred four".