213354443501055 has 64 divisors (see below), whose sum is σ = 403511722329600. Its totient is φ = 106588001640960.

The previous prime is 213354443501047. The next prime is 213354443501057. The reversal of 213354443501055 is 550105344453312.

213354443501055 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 54 + 4 + 43 + 501 + 0 + 55 = 666.

It is not a de Polignac number, because 213354443501055 - 2³ = 213354443501047 is a prime.

It is a super-2 number, since 2×213354443501055² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 213354443501055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213354443501057) 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, 219811725 + ... + 220780214.

It is an arithmetic number, because the mean of its divisors is an integer number (6304870661400).

Almost surely, 2^{213354443501055} is an apocalyptic number.

213354443501055 is a deficient number, since it is larger than the sum of its proper divisors (190157278828545).

213354443501055 is a wasteful number, since it uses less digits than its factorization.

213354443501055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440592181 (or 440592175 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

Adding to 213354443501055 its reverse (550105344453312), we get a palindrome (763459787954367).

The spelling of 213354443501055 in words is "two hundred thirteen trillion, three hundred fifty-four billion, four hundred forty-three million, five hundred one thousand, fifty-five".