53447443 has 4 divisors (see below), whose sum is σ = 61082800. Its totient is φ = 45812088.

The previous prime is 53447419. The next prime is 53447447. The reversal of 53447443 is 34474435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34474435 = 5 ⋅6894887.

It is not a de Polignac number, because 53447443 - 2⁵ = 53447411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53447399 and 53447408.

It is not an unprimeable number, because it can be changed into a prime (53447447) 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, 3817668 + ... + 3817681.

It is an arithmetic number, because the mean of its divisors is an integer number (15270700).

Almost surely, 2^53447443 is an apocalyptic number.

53447443 is a deficient number, since it is larger than the sum of its proper divisors (7635357).

53447443 is an equidigital number, since it uses as much as digits as its factorization.

53447443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7635356.

The product of its digits is 80640, while the sum is 34.

The square root of 53447443 is about 7310.7758138244. The cubic root of 53447443 is about 376.6826735916.

The spelling of 53447443 in words is "fifty-three million, four hundred forty-seven thousand, four hundred forty-three".