213240111535 has 32 divisors (see below), whose sum is σ = 296695825920. Its totient is φ = 145494921600.

The previous prime is 213240111521. The next prime is 213240111559. The reversal of 213240111535 is 535111042312.

It is not a de Polignac number, because 213240111535 - 2²¹ = 213238014383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 882936 + ... + 1098205.

It is an arithmetic number, because the mean of its divisors is an integer number (9271744560).

Almost surely, 2^213240111535 is an apocalyptic number.

213240111535 is a deficient number, since it is larger than the sum of its proper divisors (83455714385).

213240111535 is a wasteful number, since it uses less digits than its factorization.

213240111535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981279.

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

Adding to 213240111535 its reverse (535111042312), we get a palindrome (748351153847).

The spelling of 213240111535 in words is "two hundred thirteen billion, two hundred forty million, one hundred eleven thousand, five hundred thirty-five".