53404243 has 4 divisors (see below), whose sum is σ = 53431920. Its totient is φ = 53376568.

The previous prime is 53404207. The next prime is 53404261. The reversal of 53404243 is 34240435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34240435 = 5 ⋅6848087.

It is a cyclic number.

It is not a de Polignac number, because 53404243 - 2¹³ = 53396051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53404543) 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, 10708 + ... + 14881.

It is an arithmetic number, because the mean of its divisors is an integer number (13357980).

Almost surely, 2^53404243 is an apocalyptic number.

53404243 is a deficient number, since it is larger than the sum of its proper divisors (27677).

53404243 is a wasteful number, since it uses less digits than its factorization.

53404243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27676.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 53404243 is about 7307.8206737714. The cubic root of 53404243 is about 376.5811590520.

Adding to 53404243 its reverse (34240435), we get a palindrome (87644678).

The spelling of 53404243 in words is "fifty-three million, four hundred four thousand, two hundred forty-three".