213421535 has 8 divisors (see below), whose sum is σ = 257127696. Its totient is φ = 170056000.

The previous prime is 213421529. The next prime is 213421543. The reversal of 213421535 is 535124312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213421535 - 2¹⁰ = 213420511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83774 + ... + 86283.

It is an arithmetic number, because the mean of its divisors is an integer number (32140962).

Almost surely, 2^213421535 is an apocalyptic number.

213421535 is a deficient number, since it is larger than the sum of its proper divisors (43706161).

213421535 is a wasteful number, since it uses less digits than its factorization.

213421535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170313.

The product of its digits is 3600, while the sum is 26.

The square root of 213421535 is about 14608.9539324347. The cubic root of 213421535 is about 597.6029688964.

Adding to 213421535 its reverse (535124312), we get a palindrome (748545847).

The spelling of 213421535 in words is "two hundred thirteen million, four hundred twenty-one thousand, five hundred thirty-five".