53211505 has 4 divisors (see below), whose sum is σ = 63853812. Its totient is φ = 42569200.

The previous prime is 53211493. The next prime is 53211527. The reversal of 53211505 is 50511235.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35605089 + 17606416 = 5967^2 + 4196^2 .

It is not a de Polignac number, because 53211505 - 2²⁵ = 19657073 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 5321146 + ... + 5321155.

It is an arithmetic number, because the mean of its divisors is an integer number (15963453).

Almost surely, 2^53211505 is an apocalyptic number.

It is an amenable number.

53211505 is a deficient number, since it is larger than the sum of its proper divisors (10642307).

53211505 is a wasteful number, since it uses less digits than its factorization.

53211505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10642306.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 53211505 is about 7294.6216488588. The cubic root of 53211505 is about 376.1275809133.

The spelling of 53211505 in words is "fifty-three million, two hundred eleven thousand, five hundred five".