52120191 has 4 divisors (see below), whose sum is σ = 69493592. Its totient is φ = 34746792.

The previous prime is 52120183. The next prime is 52120193. The reversal of 52120191 is 19102125.

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

It is not a de Polignac number, because 52120191 - 2³ = 52120183 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 (52120193) 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, 8686696 + ... + 8686701.

It is an arithmetic number, because the mean of its divisors is an integer number (17373398).

Almost surely, 2^52120191 is an apocalyptic number.

52120191 is a deficient number, since it is larger than the sum of its proper divisors (17373401).

52120191 is a wasteful number, since it uses less digits than its factorization.

52120191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17373400.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 52120191 is about 7219.4314873126. The cubic root of 52120191 is about 373.5384676397.

The spelling of 52120191 in words is "fifty-two million, one hundred twenty thousand, one hundred ninety-one".