421532213 has 8 divisors (see below), whose sum is σ = 428307840. Its totient is φ = 414802080.

The previous prime is 421532207. The next prime is 421532257. The reversal of 421532213 is 312235124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421532213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421532113) 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, 7556 + ... + 30002.

It is an arithmetic number, because the mean of its divisors is an integer number (53538480).

Almost surely, 2^421532213 is an apocalyptic number.

It is an amenable number.

421532213 is a deficient number, since it is larger than the sum of its proper divisors (6775627).

421532213 is a wasteful number, since it uses less digits than its factorization.

421532213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22747.

The product of its digits is 1440, while the sum is 23.

The square root of 421532213 is about 20531.2496697108. The cubic root of 421532213 is about 749.7968119207.

Adding to 421532213 its reverse (312235124), we get a palindrome (733767337).

The spelling of 421532213 in words is "four hundred twenty-one million, five hundred thirty-two thousand, two hundred thirteen".