210665130 has 32 divisors (see below), whose sum is σ = 544489344. Its totient is φ = 51855936.

The previous prime is 210665129. The next prime is 210665153. The reversal of 210665130 is 31566012.

It is a self number, because there is not a number n which added to its sum of digits gives 210665130.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269694 + ... + 270473.

It is an arithmetic number, because the mean of its divisors is an integer number (17015292).

Almost surely, 2^210665130 is an apocalyptic number.

210665130 is an abundant number, since it is smaller than the sum of its proper divisors (333824214).

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

210665130 is a wasteful number, since it uses less digits than its factorization.

210665130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540190.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 210665130 is about 14514.3077685434. The cubic root of 210665130 is about 595.0190705466.

The spelling of 210665130 in words is "two hundred ten million, six hundred sixty-five thousand, one hundred thirty".