213247533 has 16 divisors (see below), whose sum is σ = 290234880. Its totient is φ = 139237296.

The previous prime is 213247499. The next prime is 213247547. The reversal of 213247533 is 335742312.

213247533 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 213247533 - 2¹⁷ = 213116461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213247533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213247633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33016 + ... + 38942.

It is an arithmetic number, because the mean of its divisors is an integer number (18139680).

Almost surely, 2^213247533 is an apocalyptic number.

It is an amenable number.

213247533 is a deficient number, since it is larger than the sum of its proper divisors (76987347).

213247533 is a wasteful number, since it uses less digits than its factorization.

213247533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176.

The product of its digits is 15120, while the sum is 30.

The square root of 213247533 is about 14602.9973977947. The cubic root of 213247533 is about 597.4405167117.

Adding to 213247533 its reverse (335742312), we get a palindrome (548989845).

The spelling of 213247533 in words is "two hundred thirteen million, two hundred forty-seven thousand, five hundred thirty-three".