53144021 has 4 divisors (see below), whose sum is σ = 60736032. Its totient is φ = 45552012.

The previous prime is 53144017. The next prime is 53144033. The reversal of 53144021 is 12044135.

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 a cyclic number.

It is not a de Polignac number, because 53144021 - 2² = 53144017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53143984 and 53144002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53144041) 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, 3795995 + ... + 3796008.

It is an arithmetic number, because the mean of its divisors is an integer number (15184008).

Almost surely, 2^53144021 is an apocalyptic number.

It is an amenable number.

53144021 is a deficient number, since it is larger than the sum of its proper divisors (7592011).

53144021 is an equidigital number, since it uses as much as digits as its factorization.

53144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592010.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 53144021 is about 7289.9945816166. The cubic root of 53144021 is about 375.9685092270.

Adding to 53144021 its reverse (12044135), we get a palindrome (65188156).

The spelling of 53144021 in words is "fifty-three million, one hundred forty-four thousand, twenty-one".