210825530 has 16 divisors (see below), whose sum is σ = 379655424. Its totient is φ = 84292560.

The previous prime is 210825529. The next prime is 210825553. The reversal of 210825530 is 35528012.

It is a self number, because there is not a number n which added to its sum of digits gives 210825530.

It is an unprimeable number.

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, 33839 + ... + 39581.

It is an arithmetic number, because the mean of its divisors is an integer number (23728464).

Almost surely, 2^210825530 is an apocalyptic number.

210825530 is a deficient number, since it is larger than the sum of its proper divisors (168829894).

210825530 is a wasteful number, since it uses less digits than its factorization.

210825530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 210825530 is about 14519.8322993070. The cubic root of 210825530 is about 595.1700476705.

The spelling of 210825530 in words is "two hundred ten million, eight hundred twenty-five thousand, five hundred thirty".