213403240535 has 4 divisors (see below), whose sum is σ = 256083888648. Its totient is φ = 170722592424.

The previous prime is 213403240529. The next prime is 213403240541. The reversal of 213403240535 is 535042304312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213403240529) and next prime (213403240541).

It is a cyclic number.

It is not a de Polignac number, because 213403240535 - 2¹⁸ = 213402978391 is a prime.

It is a super-4 number, since 4×213403240535⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21340324049 + ... + 21340324058.

It is an arithmetic number, because the mean of its divisors is an integer number (64020972162).

Almost surely, 2^213403240535 is an apocalyptic number.

213403240535 is a deficient number, since it is larger than the sum of its proper divisors (42680648113).

213403240535 is an equidigital number, since it uses as much as digits as its factorization.

213403240535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42680648112.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 213403240535 its reverse (535042304312), we get a palindrome (748445544847).

The spelling of 213403240535 in words is "two hundred thirteen billion, four hundred three million, two hundred forty thousand, five hundred thirty-five".