209250052 has 24 divisors (see below), whose sum is σ = 400865472. Its totient is φ = 94783200.

The previous prime is 209250037. The next prime is 209250053. The reversal of 209250052 is 250052902.

It is a junction number, because it is equal to n+sod(n) for n = 209249999 and 209250026.

It is not an unprimeable number, because it can be changed into a prime (209250053) 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 7 ways as a sum of consecutive naturals, for example, 4777 + ... + 21007.

It is an arithmetic number, because the mean of its divisors is an integer number (16702728).

Almost surely, 2^209250052 is an apocalyptic number.

209250052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

209250052 is a deficient number, since it is larger than the sum of its proper divisors (191615420).

209250052 is a wasteful number, since it uses less digits than its factorization.

209250052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16539 (or 16537 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 209250052 is about 14465.4779388723. The cubic root of 209250052 is about 593.6837906302.

The spelling of 209250052 in words is "two hundred nine million, two hundred fifty thousand, fifty-two".