53017391 has 8 divisors (see below), whose sum is σ = 63780480. Its totient is φ = 43051608.

The previous prime is 53017379. The next prime is 53017399. The reversal of 53017391 is 19371035.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53017391 - 2¹⁰ = 53016367 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 (53017399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199181 + ... + 199446.

It is an arithmetic number, because the mean of its divisors is an integer number (7972560).

Almost surely, 2^53017391 is an apocalyptic number.

53017391 is a deficient number, since it is larger than the sum of its proper divisors (10763089).

53017391 is a wasteful number, since it uses less digits than its factorization.

53017391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398653.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 53017391 is about 7281.3042100986. The cubic root of 53017391 is about 375.6696561905.

The spelling of 53017391 in words is "fifty-three million, seventeen thousand, three hundred ninety-one".