53212566 has 32 divisors (see below), whose sum is σ = 117417600. Its totient is φ = 15942080.

The previous prime is 53212561. The next prime is 53212603. The reversal of 53212566 is 66521235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53212561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1345 + ... + 10403.

It is an arithmetic number, because the mean of its divisors is an integer number (3669300).

Almost surely, 2^53212566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53212566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58708800).

53212566 is an abundant number, since it is smaller than the sum of its proper divisors (64205034).

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

53212566 is a wasteful number, since it uses less digits than its factorization.

53212566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9164.

The product of its digits is 10800, while the sum is 30.

The square root of 53212566 is about 7294.6943733100. The cubic root of 53212566 is about 376.1300808032.

It can be divided in two parts, 5321 and 2566, that added together give a palindrome (7887).

The spelling of 53212566 in words is "fifty-three million, two hundred twelve thousand, five hundred sixty-six".