53432391 has 4 divisors (see below), whose sum is σ = 71243192. Its totient is φ = 35621592.

The previous prime is 53432387. The next prime is 53432419. The reversal of 53432391 is 19323435.

53432391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53432391 - 2² = 53432387 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 (53432311) 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 3 ways as a sum of consecutive naturals, for example, 8905396 + ... + 8905401.

It is an arithmetic number, because the mean of its divisors is an integer number (17810798).

Almost surely, 2^53432391 is an apocalyptic number.

53432391 is a deficient number, since it is larger than the sum of its proper divisors (17810801).

53432391 is a wasteful number, since it uses less digits than its factorization.

53432391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17810800.

The product of its digits is 9720, while the sum is 30.

The square root of 53432391 is about 7309.7463020272. The cubic root of 53432391 is about 376.6473095055.

The spelling of 53432391 in words is "fifty-three million, four hundred thirty-two thousand, three hundred ninety-one".