213450440111405 has 24 divisors (see below), whose sum is σ = 301549262065632. Its totient is φ = 144602570085792.

The previous prime is 213450440111371. The next prime is 213450440111407. The reversal of 213450440111405 is 504111044054312.

It is not a de Polignac number, because 213450440111405 - 2⁶ = 213450440111341 is a prime.

It is a super-2 number, since 2×213450440111405² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213450440111407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5248330787 + ... + 5248371456.

It is an arithmetic number, because the mean of its divisors is an integer number (12564552586068).

Almost surely, 2^{213450440111405} is an apocalyptic number.

It is an amenable number.

213450440111405 is a deficient number, since it is larger than the sum of its proper divisors (88098821954227).

213450440111405 is a wasteful number, since it uses less digits than its factorization.

213450440111405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496702345 (or 10496702338 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 213450440111405 its reverse (504111044054312), we get a palindrome (717561484165717).

The spelling of 213450440111405 in words is "two hundred thirteen trillion, four hundred fifty billion, four hundred forty million, one hundred eleven thousand, four hundred five".