53442021 has 8 divisors (see below), whose sum is σ = 71461600. Its totient is φ = 35525232.

The previous prime is 53442019. The next prime is 53442083. The reversal of 53442021 is 12024435.

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

It is not a de Polignac number, because 53442021 - 2¹ = 53442019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53446021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24475 + ... + 26568.

It is an arithmetic number, because the mean of its divisors is an integer number (8932700).

Almost surely, 2^53442021 is an apocalyptic number.

It is an amenable number.

53442021 is a deficient number, since it is larger than the sum of its proper divisors (18019579).

53442021 is a wasteful number, since it uses less digits than its factorization.

53442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51395.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 53442021 is about 7310.4049819418. The cubic root of 53442021 is about 376.6699355796.

Adding to 53442021 its reverse (12024435), we get a palindrome (65466456).

The spelling of 53442021 in words is "fifty-three million, four hundred forty-two thousand, twenty-one".