252319861 has 4 divisors (see below), whose sum is σ = 253588000. Its totient is φ = 251051724.

The previous prime is 252319801. The next prime is 252319877. The reversal of 252319861 is 168913252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252319861 - 2⁹ = 252319349 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 252319861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252319801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633771 + ... + 634168.

It is an arithmetic number, because the mean of its divisors is an integer number (63397000).

Almost surely, 2^252319861 is an apocalyptic number.

It is an amenable number.

252319861 is a deficient number, since it is larger than the sum of its proper divisors (1268139).

252319861 is a wasteful number, since it uses less digits than its factorization.

252319861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268138.

The product of its digits is 25920, while the sum is 37.

The square root of 252319861 is about 15884.5793460198. The cubic root of 252319861 is about 631.9030897780.

The spelling of 252319861 in words is "two hundred fifty-two million, three hundred nineteen thousand, eight hundred sixty-one".