53212161 has 4 divisors (see below), whose sum is σ = 70949552. Its totient is φ = 35474772.

The previous prime is 53212147. The next prime is 53212171. The reversal of 53212161 is 16121235.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53212161 - 2¹⁵ = 53179393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53212171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8868691 + ... + 8868696.

It is an arithmetic number, because the mean of its divisors is an integer number (17737388).

Almost surely, 2^53212161 is an apocalyptic number.

It is an amenable number.

53212161 is a deficient number, since it is larger than the sum of its proper divisors (17737391).

53212161 is a wasteful number, since it uses less digits than its factorization.

53212161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17737390.

The product of its digits is 360, while the sum is 21.

The square root of 53212161 is about 7294.6666133553. Note that the first 4 decimals coincide. The cubic root of 53212161 is about 376.1291265607.

Adding to 53212161 its reverse (16121235), we get a palindrome (69333396).

The spelling of 53212161 in words is "fifty-three million, two hundred twelve thousand, one hundred sixty-one".