213249539 has 4 divisors (see below), whose sum is σ = 213295056. Its totient is φ = 213204024.

The previous prime is 213249511. The next prime is 213249563. The reversal of 213249539 is 935942312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213249539 - 2¹⁶ = 213184003 is a prime.

It is a super-3 number, since 3×213249539³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213249739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14804 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (53323764).

Almost surely, 2^213249539 is an apocalyptic number.

213249539 is a deficient number, since it is larger than the sum of its proper divisors (45517).

213249539 is an equidigital number, since it uses as much as digits as its factorization.

213249539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45516.

The product of its digits is 58320, while the sum is 38.

The square root of 213249539 is about 14603.0660821623. The cubic root of 213249539 is about 597.4423900618.

The spelling of 213249539 in words is "two hundred thirteen million, two hundred forty-nine thousand, five hundred thirty-nine".