213530401 has 4 divisors (see below), whose sum is σ = 244034752. Its totient is φ = 183026052.

The previous prime is 213530399. The next prime is 213530411. The reversal of 213530401 is 104035312.

213530401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 213530401 - 2¹ = 213530399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213530411) 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, 15252165 + ... + 15252178.

It is an arithmetic number, because the mean of its divisors is an integer number (61008688).

Almost surely, 2^213530401 is an apocalyptic number.

It is an amenable number.

213530401 is a deficient number, since it is larger than the sum of its proper divisors (30504351).

213530401 is an equidigital number, since it uses as much as digits as its factorization.

213530401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30504350.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 213530401 is about 14612.6794599758. The cubic root of 213530401 is about 597.7045637454.

Adding to 213530401 its reverse (104035312), we get a palindrome (317565713).

The spelling of 213530401 in words is "two hundred thirteen million, five hundred thirty thousand, four hundred one".