53440319 has 4 divisors (see below), whose sum is σ = 53529840. Its totient is φ = 53350800.

The previous prime is 53440267. The next prime is 53440337. The reversal of 53440319 is 91304435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91304435 = 5 ⋅18260887.

It is a cyclic number.

It is not a de Polignac number, because 53440319 - 2²⁰ = 52391743 is a prime.

It is a super-2 number, since 2×53440319² = 5711735389643522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53440291 and 53440300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43859 + ... + 45060.

It is an arithmetic number, because the mean of its divisors is an integer number (13382460).

Almost surely, 2^53440319 is an apocalyptic number.

53440319 is a deficient number, since it is larger than the sum of its proper divisors (89521).

53440319 is an equidigital number, since it uses as much as digits as its factorization.

53440319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89520.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 53440319 is about 7310.2885715955. The cubic root of 53440319 is about 376.6659368596.

The spelling of 53440319 in words is "fifty-three million, four hundred forty thousand, three hundred nineteen".