53211564 has 72 divisors (see below), whose sum is σ = 162777888. Its totient is φ = 14307840.

The previous prime is 53211559. The next prime is 53211583. The reversal of 53211564 is 46511235.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1927 + ... + 10494.

It is an arithmetic number, because the mean of its divisors is an integer number (2260804).

Almost surely, 2^53211564 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 53211564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81388944).

53211564 is an abundant number, since it is smaller than the sum of its proper divisors (109566324).

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

53211564 is a wasteful number, since it uses less digits than its factorization.

53211564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12455 (or 12450 counting only the distinct ones).

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

The square root of 53211564 is about 7294.6256929331. The cubic root of 53211564 is about 376.1277199278.

Adding to 53211564 its reverse (46511235), we get a palindrome (99722799).

The spelling of 53211564 in words is "fifty-three million, two hundred eleven thousand, five hundred sixty-four".