53942191 has 4 divisors (see below), whose sum is σ = 54097992. Its totient is φ = 53786392.

The previous prime is 53942177. The next prime is 53942209. The reversal of 53942191 is 19124935.

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 53942191 - 2¹¹ = 53940143 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 (53942111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77380 + ... + 78073.

It is an arithmetic number, because the mean of its divisors is an integer number (13524498).

Almost surely, 2^53942191 is an apocalyptic number.

53942191 is a deficient number, since it is larger than the sum of its proper divisors (155801).

53942191 is a wasteful number, since it uses less digits than its factorization.

53942191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155800.

The product of its digits is 9720, while the sum is 34.

The square root of 53942191 is about 7344.5347708347. The cubic root of 53942191 is about 377.8413875940.

The spelling of 53942191 in words is "fifty-three million, nine hundred forty-two thousand, one hundred ninety-one".