209148312 has 32 divisors (see below), whose sum is σ = 526870080. Its totient is φ = 69182880.

The previous prime is 209148311. The next prime is 209148323. The reversal of 209148312 is 213841902.

It is a super-3 number, since 3×209148312³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 209148312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209148311) 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, 30118 + ... + 36405.

It is an arithmetic number, because the mean of its divisors is an integer number (16464690).

Almost surely, 2^209148312 is an apocalyptic number.

It is an amenable number.

209148312 is an abundant number, since it is smaller than the sum of its proper divisors (317721768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209148312 is a wasteful number, since it uses less digits than its factorization.

209148312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66663 (or 66659 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 209148312 is about 14461.9608628982. The cubic root of 209148312 is about 593.5875561964.

It can be divided in two parts, 2091 and 48312, that added together give a triangular number (50403 = T₃₁₇).

The spelling of 209148312 in words is "two hundred nine million, one hundred forty-eight thousand, three hundred twelve".