210163009 has 27 divisors (see below), whose sum is σ = 260408547. Its totient is φ = 169093008.

The previous prime is 210163001. The next prime is 210163039. The reversal of 210163009 is 900361012.

The square root of 210163009 is 14497.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 146482609 + 63680400 = 12103^2 + 7980^2 .

It is not a de Polignac number, because 210163009 - 2³ = 210163001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210163001) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1928047 + ... + 1928155.

It is an arithmetic number, because the mean of its divisors is an integer number (9644761).

Almost surely, 2^210163009 is an apocalyptic number.

210163009 is the 14497-th square number.

210163009 is the 7249-th centered octagonal number.

It is an amenable number.

210163009 is a deficient number, since it is larger than the sum of its proper divisors (50245538).

210163009 is an equidigital number, since it uses as much as digits as its factorization.

210163009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The cubic root of 210163009 is about 594.5459511780.

Multiplying 210163009 by its product of nonzero digits (324), we get a square (68092814916 = 260946²).

It can be divided in two parts, 21016 and 3009, that added together give a square (24025 = 155²).

The spelling of 210163009 in words is "two hundred ten million, one hundred sixty-three thousand, nine".