213241409 has 2 divisors, whose sum is σ = 213241410. Its totient is φ = 213241408.

The previous prime is 213241373. The next prime is 213241439. The reversal of 213241409 is 904142312.

213241409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115627009 + 97614400 = 10753^2 + 9880^2 .

It is a cyclic number.

It is not a de Polignac number, because 213241409 - 2²⁰ = 212192833 is a prime.

It is not a weakly prime, because it can be changed into another prime (213241439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106620704 + 106620705.

It is an arithmetic number, because the mean of its divisors is an integer number (106620705).

Almost surely, 2^213241409 is an apocalyptic number.

It is an amenable number.

213241409 is a deficient number, since it is larger than the sum of its proper divisors (1).

213241409 is an equidigital number, since it uses as much as digits as its factorization.

213241409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 213241409 is about 14602.7877133101. The cubic root of 213241409 is about 597.4347975978.

The spelling of 213241409 in words is "two hundred thirteen million, two hundred forty-one thousand, four hundred nine".