421013213 has 8 divisors (see below), whose sum is σ = 435781080. Its totient is φ = 406262080.

The previous prime is 421013209. The next prime is 421013237. The reversal of 421013213 is 312310124.

It can be written as a sum of positive squares in 4 ways, for example, as 58415449 + 362597764 = 7643^2 + 19042^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 421013213 - 2² = 421013209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421013191 and 421013200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421013273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68903 + ... + 74763.

It is an arithmetic number, because the mean of its divisors is an integer number (54472635).

Almost surely, 2^421013213 is an apocalyptic number.

It is an amenable number.

421013213 is a deficient number, since it is larger than the sum of its proper divisors (14767867).

421013213 is a wasteful number, since it uses less digits than its factorization.

421013213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8367.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 421013213 is about 20518.6065072655. The cubic root of 421013213 is about 749.4889632751.

Adding to 421013213 its reverse (312310124), we get a palindrome (733323337).

The spelling of 421013213 in words is "four hundred twenty-one million, thirteen thousand, two hundred thirteen".