421564213 has 16 divisors (see below), whose sum is σ = 500544000. Its totient is φ = 347380992.

The previous prime is 421564183. The next prime is 421564219. The reversal of 421564213 is 312465124.

It is not a de Polignac number, because 421564213 - 2¹⁷ = 421433141 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 (421564219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44173 + ... + 52861.

It is an arithmetic number, because the mean of its divisors is an integer number (31284000).

Almost surely, 2^421564213 is an apocalyptic number.

It is an amenable number.

421564213 is a deficient number, since it is larger than the sum of its proper divisors (78979787).

421564213 is a wasteful number, since it uses less digits than its factorization.

421564213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8964.

The product of its digits is 5760, while the sum is 28.

The square root of 421564213 is about 20532.0289547818. The cubic root of 421564213 is about 749.8157846826.

The spelling of 421564213 in words is "four hundred twenty-one million, five hundred sixty-four thousand, two hundred thirteen".