252691791 has 16 divisors (see below), whose sum is σ = 389173248. Its totient is φ = 144137600.

The previous prime is 252691783. The next prime is 252691793. The reversal of 252691791 is 197196252.

It is a cyclic number.

It is not a de Polignac number, because 252691791 - 2³ = 252691783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252691793) 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 15 ways as a sum of consecutive naturals, for example, 224655 + ... + 225776.

It is an arithmetic number, because the mean of its divisors is an integer number (24323328).

Almost surely, 2^252691791 is an apocalyptic number.

252691791 is a deficient number, since it is larger than the sum of its proper divisors (136481457).

252691791 is a wasteful number, since it uses less digits than its factorization.

252691791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450462.

The product of its digits is 68040, while the sum is 42.

The square root of 252691791 is about 15896.2823012175. The cubic root of 252691791 is about 632.2134211849.

The spelling of 252691791 in words is "two hundred fifty-two million, six hundred ninety-one thousand, seven hundred ninety-one".