526642213 has 4 divisors (see below), whose sum is σ = 529996780. Its totient is φ = 523287648.

The previous prime is 526642169. The next prime is 526642243. The reversal of 526642213 is 312246625.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98069409 + 428572804 = 9903^2 + 20702^2 .

It is a cyclic number.

It is not a de Polignac number, because 526642213 - 2⁹ = 526641701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (526642243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677048 + ... + 1677361.

It is an arithmetic number, because the mean of its divisors is an integer number (132499195).

Almost surely, 2^526642213 is an apocalyptic number.

It is an amenable number.

526642213 is a deficient number, since it is larger than the sum of its proper divisors (3354567).

526642213 is a wasteful number, since it uses less digits than its factorization.

526642213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354566.

The product of its digits is 17280, while the sum is 31.

The square root of 526642213 is about 22948.6865201475. The cubic root of 526642213 is about 807.5545882895.

Adding to 526642213 its reverse (312246625), we get a palindrome (838888838).

The spelling of 526642213 in words is "five hundred twenty-six million, six hundred forty-two thousand, two hundred thirteen".