252018909 has 6 divisors (see below), whose sum is σ = 364027326. Its totient is φ = 168012600.

The previous prime is 252018887. The next prime is 252018911. The reversal of 252018909 is 909810252.

It can be written as a sum of positive squares in only one way, i.e., 206496900 + 45522009 = 14370^2 + 6747^2 .

It is not a de Polignac number, because 252018909 - 2²⁰ = 250970333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252018209) 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 5 ways as a sum of consecutive naturals, for example, 14001042 + ... + 14001059.

It is an arithmetic number, because the mean of its divisors is an integer number (60671221).

Almost surely, 2^252018909 is an apocalyptic number.

It is an amenable number.

252018909 is a deficient number, since it is larger than the sum of its proper divisors (112008417).

252018909 is a wasteful number, since it uses less digits than its factorization.

252018909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28002107 (or 28002104 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 252018909 is about 15875.1034327339. The cubic root of 252018909 is about 631.6517577890.

The spelling of 252018909 in words is "two hundred fifty-two million, eighteen thousand, nine hundred nine".