209380516 has 12 divisors (see below), whose sum is σ = 368535132. Its totient is φ = 104084768.

The previous prime is 209380499. The next prime is 209380543. The reversal of 209380516 is 615083902.

209380516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 195720100 + 13660416 = 13990^2 + 3696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150595 + ... + 151978.

It is an arithmetic number, because the mean of its divisors is an integer number (30711261).

Almost surely, 2^209380516 is an apocalyptic number.

It is an amenable number.

209380516 is a deficient number, since it is larger than the sum of its proper divisors (159154616).

209380516 is a wasteful number, since it uses less digits than its factorization.

209380516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302750 (or 302748 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 209380516 is about 14469.9867311618. The cubic root of 209380516 is about 593.8071490550.

The spelling of 209380516 in words is "two hundred nine million, three hundred eighty thousand, five hundred sixteen".