213242329 has 2 divisors, whose sum is σ = 213242330. Its totient is φ = 213242328.

The previous prime is 213242291. The next prime is 213242347. The reversal of 213242329 is 923242312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143352729 + 69889600 = 11973^2 + 8360^2 .

It is a cyclic number.

It is not a de Polignac number, because 213242329 - 2⁷ = 213242201 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213242297 and 213242306.

It is not a weakly prime, because it can be changed into another prime (213242369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621164 + 106621165.

It is an arithmetic number, because the mean of its divisors is an integer number (106621165).

Almost surely, 2^213242329 is an apocalyptic number.

It is an amenable number.

213242329 is a deficient number, since it is larger than the sum of its proper divisors (1).

213242329 is an equidigital number, since it uses as much as digits as its factorization.

213242329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 213242329 is about 14602.8192141107. The cubic root of 213242329 is about 597.4356567793.

It can be divided in two parts, 21324 and 2329, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 213242329 in words is "two hundred thirteen million, two hundred forty-two thousand, three hundred twenty-nine".