213018533 has 24 divisors (see below), whose sum is σ = 268539768. Its totient is φ = 167481216.

The previous prime is 213018529. The next prime is 213018541. The reversal of 213018533 is 335810312.

It can be written as a sum of positive squares in 4 ways, for example, as 54434884 + 158583649 = 7378^2 + 12593^2 .

It is not a de Polignac number, because 213018533 - 2² = 213018529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213018503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109235 + ... + 111167.

It is an arithmetic number, because the mean of its divisors is an integer number (11189157).

Almost surely, 2^213018533 is an apocalyptic number.

It is an amenable number.

213018533 is a deficient number, since it is larger than the sum of its proper divisors (55521235).

213018533 is a wasteful number, since it uses less digits than its factorization.

213018533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133 (or 2126 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 213018533 is about 14595.1544356338. The cubic root of 213018533 is about 597.2265824181.

Adding to 213018533 its reverse (335810312), we get a palindrome (548828845).

The spelling of 213018533 in words is "two hundred thirteen million, eighteen thousand, five hundred thirty-three".