420521213 has 16 divisors (see below), whose sum is σ = 502118400. Its totient is φ = 344344176.

The previous prime is 420521207. The next prime is 420521221. The reversal of 420521213 is 312125024.

It is a cyclic number.

It is not a de Polignac number, because 420521213 - 2⁶ = 420521149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420521263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224306 + ... + 226172.

It is an arithmetic number, because the mean of its divisors is an integer number (31382400).

Almost surely, 2^420521213 is an apocalyptic number.

It is an amenable number.

420521213 is a deficient number, since it is larger than the sum of its proper divisors (81597187).

420521213 is a wasteful number, since it uses less digits than its factorization.

420521213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 420521213 is about 20506.6138843057. The cubic root of 420521213 is about 749.1968961912.

Adding to 420521213 its reverse (312125024), we get a palindrome (732646237).

The spelling of 420521213 in words is "four hundred twenty million, five hundred twenty-one thousand, two hundred thirteen".