213500430505 has 16 divisors (see below), whose sum is σ = 259468485120. Its totient is φ = 168622114752.

The previous prime is 213500430487. The next prime is 213500430523. The reversal of 213500430505 is 505034005312.

It is an interprime number because it is at equal distance from previous prime (213500430487) and next prime (213500430523).

It is a cyclic number.

It is not a de Polignac number, because 213500430505 - 2¹¹ = 213500428457 is a prime.

It is a super-3 number, since 3×213500430505³ (a number of 35 digits) contains 333 as substring.

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, 5672007 + ... + 5709523.

It is an arithmetic number, because the mean of its divisors is an integer number (16216780320).

Almost surely, 2^213500430505 is an apocalyptic number.

It is an amenable number.

213500430505 is a deficient number, since it is larger than the sum of its proper divisors (45968054615).

213500430505 is a wasteful number, since it uses less digits than its factorization.

213500430505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52008.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 213500430505 its reverse (505034005312), we get a palindrome (718534435817).

The spelling of 213500430505 in words is "two hundred thirteen billion, five hundred million, four hundred thirty thousand, five hundred five".