213511111304 has 16 divisors (see below), whose sum is σ = 401406619020. Its totient is φ = 106469346240.

The previous prime is 213511111301. The next prime is 213511111361. The reversal of 213511111304 is 403111115312.

It can be written as a sum of positive squares in 2 ways, for example, as 210040723204 + 3470388100 = 458302^2 + 58910^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213511111304.

It is not an unprimeable number, because it can be changed into a prime (213511111301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35773007 + ... + 35778974.

Almost surely, 2^213511111304 is an apocalyptic number.

It is an amenable number.

213511111304 is a deficient number, since it is larger than the sum of its proper divisors (187895507716).

213511111304 is a wasteful number, since it uses less digits than its factorization.

213511111304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71552360 (or 71552356 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 213511111304 its reverse (403111115312), we get a palindrome (616622226616).

The spelling of 213511111304 in words is "two hundred thirteen billion, five hundred eleven million, one hundred eleven thousand, three hundred four".