52131791 has 4 divisors (see below), whose sum is σ = 52619112. Its totient is φ = 51644472.

The previous prime is 52131773. The next prime is 52131799. The reversal of 52131791 is 19713125.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52131791 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 (52131799) 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, 243500 + ... + 243713.

It is an arithmetic number, because the mean of its divisors is an integer number (13154778).

Almost surely, 2^52131791 is an apocalyptic number.

52131791 is a deficient number, since it is larger than the sum of its proper divisors (487321).

52131791 is a wasteful number, since it uses less digits than its factorization.

52131791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487320.

The product of its digits is 1890, while the sum is 29.

The square root of 52131791 is about 7220.2348299761. The cubic root of 52131791 is about 373.5661774691.

The spelling of 52131791 in words is "fifty-two million, one hundred thirty-one thousand, seven hundred ninety-one".