209450530 has 8 divisors (see below), whose sum is σ = 377010972. Its totient is φ = 83780208.

The previous prime is 209450519. The next prime is 209450543. The reversal of 209450530 is 35054902.

It can be written as a sum of positive squares in 2 ways, for example, as 187388721 + 22061809 = 13689^2 + 4697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 10472517 + ... + 10472536.

Almost surely, 2^209450530 is an apocalyptic number.

209450530 is a deficient number, since it is larger than the sum of its proper divisors (167560442).

209450530 is a wasteful number, since it uses less digits than its factorization.

209450530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20945060.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 209450530 is about 14472.4058124418. The cubic root of 209450530 is about 593.8733286935.

The spelling of 209450530 in words is "two hundred nine million, four hundred fifty thousand, five hundred thirty".