213533401 has 4 divisors (see below), whose sum is σ = 219304612. Its totient is φ = 207762192.

The previous prime is 213533393. The next prime is 213533407. The reversal of 213533401 is 104335312.

213533401 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.

It can be written as a sum of positive squares in 2 ways, for example, as 172265625 + 41267776 = 13125^2 + 6424^2 .

It is a cyclic number.

It is not a de Polignac number, because 213533401 - 2³ = 213533393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213533407) 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, 2885550 + ... + 2885623.

It is an arithmetic number, because the mean of its divisors is an integer number (54826153).

Almost surely, 2^213533401 is an apocalyptic number.

It is an amenable number.

213533401 is a deficient number, since it is larger than the sum of its proper divisors (5771211).

213533401 is an equidigital number, since it uses as much as digits as its factorization.

213533401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771210.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 213533401 is about 14612.7821101938. The cubic root of 213533401 is about 597.7073628867.

Adding to 213533401 its reverse (104335312), we get a palindrome (317868713).

The spelling of 213533401 in words is "two hundred thirteen million, five hundred thirty-three thousand, four hundred one".