53217040 has 20 divisors (see below), whose sum is σ = 123729804. Its totient is φ = 21286784.

The previous prime is 53217023. The next prime is 53217091. The reversal of 53217040 is 4071235.

It can be written as a sum of positive squares in 2 ways, for example, as 7573504 + 45643536 = 2752^2 + 6756^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332527 + ... + 332686.

Almost surely, 2^53217040 is an apocalyptic number.

It is an amenable number.

53217040 is an abundant number, since it is smaller than the sum of its proper divisors (70512764).

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

53217040 is a wasteful number, since it uses less digits than its factorization.

53217040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665226 (or 665220 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 53217040 is about 7295.0010281014. The cubic root of 53217040 is about 376.1406219150.

Adding to 53217040 its reverse (4071235), we get a palindrome (57288275).

The spelling of 53217040 in words is "fifty-three million, two hundred seventeen thousand, forty".