53216040 has 32 divisors (see below), whose sum is σ = 159648480. Its totient is φ = 14190912.

The previous prime is 53216039. The next prime is 53216047. The reversal of 53216040 is 4061235.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 53215998 and 53216016.

It is not an unprimeable number, because it can be changed into a prime (53216047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221614 + ... + 221853.

It is an arithmetic number, because the mean of its divisors is an integer number (4989015).

Almost surely, 2^53216040 is an apocalyptic number.

It is an amenable number.

53216040 is an abundant number, since it is smaller than the sum of its proper divisors (106432440).

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

53216040 is a wasteful number, since it uses less digits than its factorization.

53216040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443481 (or 443477 counting only the distinct ones).

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

The square root of 53216040 is about 7294.9324876931. The cubic root of 53216040 is about 376.1382658840.

Adding to 53216040 its reverse (4061235), we get a palindrome (57277275).

The spelling of 53216040 in words is "fifty-three million, two hundred sixteen thousand, forty".