213510401 has 4 divisors (see below), whose sum is σ = 229934292. Its totient is φ = 197086512.

The previous prime is 213510397. The next prime is 213510413. The reversal of 213510401 is 104015312.

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 21715600 + 191794801 = 4660^2 + 13849^2 .

It is a cyclic number.

It is not a de Polignac number, because 213510401 - 2² = 213510397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213510401.

It is not an unprimeable number, because it can be changed into a prime (213510421) 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 3 ways as a sum of consecutive naturals, for example, 8211926 + ... + 8211951.

It is an arithmetic number, because the mean of its divisors is an integer number (57483573).

Almost surely, 2^213510401 is an apocalyptic number.

It is an amenable number.

213510401 is a deficient number, since it is larger than the sum of its proper divisors (16423891).

213510401 is a wasteful number, since it uses less digits than its factorization.

213510401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16423890.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 213510401 is about 14611.9951067607. The cubic root of 213510401 is about 597.6859021334.

Adding to 213510401 its reverse (104015312), we get a palindrome (317525713).

The spelling of 213510401 in words is "two hundred thirteen million, five hundred ten thousand, four hundred one".