53542021 has 8 divisors (see below), whose sum is σ = 57869784. Its totient is φ = 49244160.

The previous prime is 53542007. The next prime is 53542043. The reversal of 53542021 is 12024535.

53542021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19448100 + 34093921 = 4410^2 + 5839^2 .

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 53542021 - 2⁷ = 53541893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53541983 and 53542001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53542081) 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, 3676 + ... + 10981.

It is an arithmetic number, because the mean of its divisors is an integer number (7233723).

Almost surely, 2^53542021 is an apocalyptic number.

It is an amenable number.

53542021 is a deficient number, since it is larger than the sum of its proper divisors (4327763).

53542021 is a wasteful number, since it uses less digits than its factorization.

53542021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14951.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 53542021 is about 7317.2413517664. The cubic root of 53542021 is about 376.9047291200.

Adding to 53542021 its reverse (12024535), we get a palindrome (65566556).

The spelling of 53542021 in words is "fifty-three million, five hundred forty-two thousand, twenty-one".