53345543 has 4 divisors (see below), whose sum is σ = 53377728. Its totient is φ = 53313360.

The previous prime is 53345531. The next prime is 53345549. The reversal of 53345543 is 34554335.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34554335 = 5 ⋅6910867.

It is a cyclic number.

It is not a de Polignac number, because 53345543 - 2¹⁸ = 53083399 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 (53345549) 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, 13463 + ... + 16968.

It is an arithmetic number, because the mean of its divisors is an integer number (13344432).

Almost surely, 2^53345543 is an apocalyptic number.

53345543 is a deficient number, since it is larger than the sum of its proper divisors (32185).

53345543 is a wasteful number, since it uses less digits than its factorization.

53345543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32184.

The product of its digits is 54000, while the sum is 32.

The square root of 53345543 is about 7303.8033242962. The cubic root of 53345543 is about 376.4431337013.

Adding to 53345543 its reverse (34554335), we get a palindrome (87899878).

The spelling of 53345543 in words is "fifty-three million, three hundred forty-five thousand, five hundred forty-three".