53215020 has 72 divisors (see below), whose sum is σ = 162249360. Its totient is φ = 14117760.

The previous prime is 53215009. The next prime is 53215033. The reversal of 53215020 is 2051235.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53214984 and 53215002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40575 + ... + 41865.

Almost surely, 2^53215020 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 53215020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81124680).

53215020 is an abundant number, since it is smaller than the sum of its proper divisors (109034340).

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

53215020 is a wasteful number, since it uses less digits than its factorization.

53215020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 53215020 is about 7294.8625758132. The cubic root of 53215020 is about 376.1358627021.

Adding to 53215020 its reverse (2051235), we get a palindrome (55266255).

The spelling of 53215020 in words is "fifty-three million, two hundred fifteen thousand, twenty".