213327021 has 4 divisors (see below), whose sum is σ = 284436032. Its totient is φ = 142218012.

The previous prime is 213327019. The next prime is 213327071. The reversal of 213327021 is 120723312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213327021 - 2¹ = 213327019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213327071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35554501 + ... + 35554506.

It is an arithmetic number, because the mean of its divisors is an integer number (71109008).

Almost surely, 2^213327021 is an apocalyptic number.

It is an amenable number.

213327021 is a deficient number, since it is larger than the sum of its proper divisors (71109011).

213327021 is an equidigital number, since it uses as much as digits as its factorization.

213327021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71109010.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 213327021 is about 14605.7187772461. The cubic root of 213327021 is about 597.5147394577.

The spelling of 213327021 in words is "two hundred thirteen million, three hundred twenty-seven thousand, twenty-one".