213242429 has 2 divisors, whose sum is σ = 213242430. Its totient is φ = 213242428.

The previous prime is 213242401. The next prime is 213242473. The reversal of 213242429 is 924242312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213218404 + 24025 = 14602^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 213242429 - 2¹⁶ = 213176893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213242489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621214 + 106621215.

It is an arithmetic number, because the mean of its divisors is an integer number (106621215).

Almost surely, 2^213242429 is an apocalyptic number.

It is an amenable number.

213242429 is a deficient number, since it is larger than the sum of its proper divisors (1).

213242429 is an equidigital number, since it uses as much as digits as its factorization.

213242429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 213242429 is about 14602.8226381066. The cubic root of 213242429 is about 597.4357501685.

The spelling of 213242429 in words is "two hundred thirteen million, two hundred forty-two thousand, four hundred twenty-nine".