213521411305 has 16 divisors (see below), whose sum is σ = 260537949504. Its totient is φ = 167944697280.

The previous prime is 213521411293. The next prime is 213521411321. The reversal of 213521411305 is 503114125312.

It is not a de Polignac number, because 213521411305 - 2¹⁵ = 213521378537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566694 + ... + 864976.

It is an arithmetic number, because the mean of its divisors is an integer number (16283621844).

Almost surely, 2^213521411305 is an apocalyptic number.

It is an amenable number.

213521411305 is a deficient number, since it is larger than the sum of its proper divisors (47016538199).

213521411305 is a wasteful number, since it uses less digits than its factorization.

213521411305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300696.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 213521411305 its reverse (503114125312), we get a palindrome (716635536617).

The spelling of 213521411305 in words is "two hundred thirteen billion, five hundred twenty-one million, four hundred eleven thousand, three hundred five".