53153021 has 8 divisors (see below), whose sum is σ = 54144600. Its totient is φ = 52165440.

The previous prime is 53152907. The next prime is 53153063. The reversal of 53153021 is 12035135.

It can be written as a sum of positive squares in 4 ways, for example, as 2544025 + 50608996 = 1595^2 + 7114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53153021 - 2¹⁴ = 53136637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53152984 and 53153002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53153071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42635 + ... + 43863.

It is an arithmetic number, because the mean of its divisors is an integer number (6768075).

Almost surely, 2^53153021 is an apocalyptic number.

It is an amenable number.

53153021 is a deficient number, since it is larger than the sum of its proper divisors (991579).

53153021 is a wasteful number, since it uses less digits than its factorization.

53153021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 53153021 is about 7290.6118398938. The cubic root of 53153021 is about 375.9897315930.

Adding to 53153021 its reverse (12035135), we get a palindrome (65188156).

The spelling of 53153021 in words is "fifty-three million, one hundred fifty-three thousand, twenty-one".