53057191 has 4 divisors (see below), whose sum is σ = 57880584. Its totient is φ = 48233800.

The previous prime is 53057183. The next prime is 53057209. The reversal of 53057191 is 19175035.

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

It is a cyclic number.

It is not a de Polignac number, because 53057191 - 2³ = 53057183 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53057161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2411680 + ... + 2411701.

It is an arithmetic number, because the mean of its divisors is an integer number (14470146).

Almost surely, 2^53057191 is an apocalyptic number.

53057191 is a deficient number, since it is larger than the sum of its proper divisors (4823393).

53057191 is a wasteful number, since it uses less digits than its factorization.

53057191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823392.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 53057191 is about 7284.0367242347. The cubic root of 53057191 is about 375.7636373805.

The spelling of 53057191 in words is "fifty-three million, fifty-seven thousand, one hundred ninety-one".