213429 has 4 divisors (see below), whose sum is σ = 284576. Its totient is φ = 142284.

The previous prime is 213407. The next prime is 213449. The reversal of 213429 is 924312.

213429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213429 - 2⁵ = 213397 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35569 + ... + 35574.

It is an arithmetic number, because the mean of its divisors is an integer number (71144).

2²¹³⁴²⁹ is an apocalyptic number.

It is an amenable number.

213429 is a deficient number, since it is larger than the sum of its proper divisors (71147).

213429 is an equidigital number, since it uses as much as digits as its factorization.

213429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71146.

The product of its digits is 432, while the sum is 21.

The square root of 213429 is about 461.9837659485. The cubic root of 213429 is about 59.7609936413.

It can be divided in two parts, 2 and 13429, that added together give a palindrome (13431).

The spelling of 213429 in words is "two hundred thirteen thousand, four hundred twenty-nine".