210025009 has 2 divisors, whose sum is σ = 210025010. Its totient is φ = 210025008.

The previous prime is 210024961. The next prime is 210025027. The reversal of 210025009 is 900520012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190026225 + 19998784 = 13785^2 + 4472^2 .

It is a cyclic number.

It is not a de Polignac number, because 210025009 - 2¹³ = 210016817 is a prime.

It is a super-2 number, since 2×210025009² = 88221008810900162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210025609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105012504 + 105012505.

It is an arithmetic number, because the mean of its divisors is an integer number (105012505).

Almost surely, 2^210025009 is an apocalyptic number.

It is an amenable number.

210025009 is a deficient number, since it is larger than the sum of its proper divisors (1).

210025009 is an equidigital number, since it uses as much as digits as its factorization.

210025009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 210025009 is about 14492.2396129791. The cubic root of 210025009 is about 594.4157898229.

The spelling of 210025009 in words is "two hundred ten million, twenty-five thousand, nine".