53212505 has 4 divisors (see below), whose sum is σ = 63855012. Its totient is φ = 42570000.

The previous prime is 53212487. The next prime is 53212529. The reversal of 53212505 is 50521235.

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 17547721 + 35664784 = 4189^2 + 5972^2 .

It is not a de Polignac number, because 53212505 - 2²⁰ = 52163929 is a prime.

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, 5321246 + ... + 5321255.

It is an arithmetic number, because the mean of its divisors is an integer number (15963753).

Almost surely, 2^53212505 is an apocalyptic number.

It is an amenable number.

53212505 is a deficient number, since it is larger than the sum of its proper divisors (10642507).

53212505 is a wasteful number, since it uses less digits than its factorization.

53212505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10642506.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 53212505 is about 7294.6901921877. The cubic root of 53212505 is about 376.1299370781.

The spelling of 53212505 in words is "fifty-three million, two hundred twelve thousand, five hundred five".