53117191 has 8 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 51868128.

The previous prime is 53117177. The next prime is 53117201. The reversal of 53117191 is 19171135.

53117191 = 1040² + 1041² + ... + 1086².

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 53117191 - 2¹⁷ = 52986119 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 (53117101) 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, 25165 + ... + 27193.

It is an arithmetic number, because the mean of its divisors is an integer number (6796440).

Almost surely, 2^53117191 is an apocalyptic number.

53117191 is a deficient number, since it is larger than the sum of its proper divisors (1254329).

53117191 is a wasteful number, since it uses less digits than its factorization.

53117191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633.

The product of its digits is 945, while the sum is 28.

The square root of 53117191 is about 7288.1541558889. The cubic root of 53117191 is about 375.9052287744.

The spelling of 53117191 in words is "fifty-three million, one hundred seventeen thousand, one hundred ninety-one".