53144321 has 4 divisors (see below), whose sum is σ = 54580692. Its totient is φ = 51707952.

The previous prime is 53144317. The next prime is 53144341. The reversal of 53144321 is 12344135.

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 33466225 + 19678096 = 5785^2 + 4436^2 .

It is a cyclic number.

It is not a de Polignac number, because 53144321 - 2² = 53144317 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 (53144341) 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, 718130 + ... + 718203.

It is an arithmetic number, because the mean of its divisors is an integer number (13645173).

Almost surely, 2^53144321 is an apocalyptic number.

It is an amenable number.

53144321 is a deficient number, since it is larger than the sum of its proper divisors (1436371).

53144321 is a wasteful number, since it uses less digits than its factorization.

53144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436370.

The product of its digits is 1440, while the sum is 23.

The square root of 53144321 is about 7290.0151577346. The cubic root of 53144321 is about 375.9692166778.

Adding to 53144321 its reverse (12344135), we get a palindrome (65488456).

The spelling of 53144321 in words is "fifty-three million, one hundred forty-four thousand, three hundred twenty-one".