213530021145 has 48 divisors (see below), whose sum is σ = 423026273280. Its totient is φ = 97606000512.

The previous prime is 213530021137. The next prime is 213530021171. The reversal of 213530021145 is 541120035312.

213530021145 is a `hidden beast` number, since 2 + 13 + 530 + 0 + 2 + 114 + 5 = 666.

213530021145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213530021145 - 2³ = 213530021137 is a prime.

It is a super-2 number, since 2×213530021145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6405912 + ... + 6439158.

It is an arithmetic number, because the mean of its divisors is an integer number (8813047360).

Almost surely, 2^213530021145 is an apocalyptic number.

It is an amenable number.

213530021145 is a deficient number, since it is larger than the sum of its proper divisors (209496252135).

213530021145 is a wasteful number, since it uses less digits than its factorization.

213530021145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53654 (or 53651 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 213530021145 its reverse (541120035312), we get a palindrome (754650056457).

The spelling of 213530021145 in words is "two hundred thirteen billion, five hundred thirty million, twenty-one thousand, one hundred forty-five".