53333391 has 16 divisors (see below), whose sum is σ = 74594304. Its totient is φ = 33855264.

The previous prime is 53333387. The next prime is 53333419. The reversal of 53333391 is 19333335.

It is not a de Polignac number, because 53333391 - 2² = 53333387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53333311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106 + ... + 10328.

It is an arithmetic number, because the mean of its divisors is an integer number (4662144).

Almost surely, 2^53333391 is an apocalyptic number.

53333391 is a deficient number, since it is larger than the sum of its proper divisors (21260913).

53333391 is a wasteful number, since it uses less digits than its factorization.

53333391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10310.

The product of its digits is 10935, while the sum is 30.

The square root of 53333391 is about 7302.9713815679. The cubic root of 53333391 is about 376.4145472184.

The spelling of 53333391 in words is "fifty-three million, three hundred thirty-three thousand, three hundred ninety-one".