53153820 has 72 divisors (see below), whose sum is σ = 167220144. Its totient is φ = 14173056.

The previous prime is 53153801. The next prime is 53153827. The reversal of 53153820 is 2835135.

53153820 is a `hidden beast` number, since 531 + 53 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53153827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609 + ... + 10328.

It is an arithmetic number, because the mean of its divisors is an integer number (2322502).

Almost surely, 2^53153820 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 53153820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83610072).

53153820 is an abundant number, since it is smaller than the sum of its proper divisors (114066324).

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

53153820 is a wasteful number, since it uses less digits than its factorization.

53153820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10961 (or 10947 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 53153820 is about 7290.6666361863. Note that the first 4 decimals coincide. The cubic root of 53153820 is about 375.9916155517.

Adding to 53153820 its reverse (2835135), we get a palindrome (55988955).

The spelling of 53153820 in words is "fifty-three million, one hundred fifty-three thousand, eight hundred twenty".