53130021 has 8 divisors (see below), whose sum is σ = 80960064. Its totient is φ = 30360000.

The previous prime is 53130019. The next prime is 53130029. The reversal of 53130021 is 12003135.

It is a happy number.

53130021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 53130021 - 2¹ = 53130019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53130029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264980 + ... + 1265021.

It is an arithmetic number, because the mean of its divisors is an integer number (10120008).

Almost surely, 2^53130021 is an apocalyptic number.

It is an amenable number.

53130021 is a deficient number, since it is larger than the sum of its proper divisors (27830043).

53130021 is a wasteful number, since it uses less digits than its factorization.

53130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530011.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 53130021 is about 7289.0342981770. The cubic root of 53130021 is about 375.9354918947.

Adding to 53130021 its reverse (12003135), we get a palindrome (65133156).

The spelling of 53130021 in words is "fifty-three million, one hundred thirty thousand, twenty-one".