213213431445 has 64 divisors (see below), whose sum is σ = 394328223744. Its totient is φ = 96359155200.

The previous prime is 213213431441. The next prime is 213213431447. The reversal of 213213431445 is 544134312312.

It is not a de Polignac number, because 213213431445 - 2² = 213213431441 is a prime.

It is a super-3 number, since 3×213213431445³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213213431441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6483414 + ... + 6516216.

It is an arithmetic number, because the mean of its divisors is an integer number (6161378496).

Almost surely, 2^213213431445 is an apocalyptic number.

It is an amenable number.

213213431445 is a deficient number, since it is larger than the sum of its proper divisors (181114792299).

213213431445 is a wasteful number, since it uses less digits than its factorization.

213213431445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33522.

The product of its digits is 34560, while the sum is 33.

Adding to 213213431445 its reverse (544134312312), we get a palindrome (757347743757).

The spelling of 213213431445 in words is "two hundred thirteen billion, two hundred thirteen million, four hundred thirty-one thousand, four hundred forty-five".