213040052 has 12 divisors (see below), whose sum is σ = 373103556. Its totient is φ = 106439040.

The previous prime is 213040031. The next prime is 213040057. The reversal of 213040052 is 250040312.

It can be written as a sum of positive squares in 2 ways, for example, as 132112036 + 80928016 = 11494^2 + 8996^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213040052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213040057) 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, 14123 + ... + 25010.

It is an arithmetic number, because the mean of its divisors is an integer number (31091963).

Almost surely, 2^213040052 is an apocalyptic number.

It is an amenable number.

213040052 is a deficient number, since it is larger than the sum of its proper divisors (160063504).

213040052 is a wasteful number, since it uses less digits than its factorization.

213040052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40498 (or 40496 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 213040052 is about 14595.8916137384. The cubic root of 213040052 is about 597.2466922272.

Adding to 213040052 its reverse (250040312), we get a palindrome (463080364).

The spelling of 213040052 in words is "two hundred thirteen million, forty thousand, fifty-two".