53000391 has 12 divisors (see below), whose sum is σ = 72682296. Its totient is φ = 34328880.

The previous prime is 53000383. The next prime is 53000393. The reversal of 53000391 is 19300035.

53000391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53000391 - 2³ = 53000383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53000393) 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 11 ways as a sum of consecutive naturals, for example, 76356 + ... + 77046.

It is an arithmetic number, because the mean of its divisors is an integer number (6056858).

Almost surely, 2^53000391 is an apocalyptic number.

53000391 is a deficient number, since it is larger than the sum of its proper divisors (19681905).

53000391 is an frugal number, since it uses more digits than its factorization.

53000391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 53000391 is about 7280.1367432212. The cubic root of 53000391 is about 375.6294991354.

The spelling of 53000391 in words is "fifty-three million, three hundred ninety-one", and thus it is an aban number.