52157791 has 8 divisors (see below), whose sum is σ = 59661440. Its totient is φ = 44667288.

The previous prime is 52157789. The next prime is 52157797. The reversal of 52157791 is 19775125.

52157791 is a nontrivial binomial coefficient, being equal to C(10214, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(52157791) divides (52157791-1)³.

It is a cyclic number.

It is not a de Polignac number, because 52157791 - 2¹ = 52157789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52157791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52157797) 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, 7660 + ... + 12766.

It is an arithmetic number, because the mean of its divisors is an integer number (7457680).

Almost surely, 2^52157791 is an apocalyptic number.

52157791 is the 10213-rd triangular number and also the 5107-th hexagonal number.

52157791 is the 3405-th centered nonagonal number.

52157791 is a deficient number, since it is larger than the sum of its proper divisors (7503649).

52157791 is a wasteful number, since it uses less digits than its factorization.

52157791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573.

The product of its digits is 22050, while the sum is 37.

The square root of 52157791 is about 7222.0351009947. The cubic root of 52157791 is about 373.6282707791.

The spelling of 52157791 in words is "fifty-two million, one hundred fifty-seven thousand, seven hundred ninety-one".