523216511 has 4 divisors (see below), whose sum is σ = 526349712. Its totient is φ = 520083312.

The previous prime is 523216501. The next prime is 523216523. The reversal of 523216511 is 115612325.

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 523216511 - 2¹⁰ = 523215487 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 (523216501) 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, 1566350 + ... + 1566683.

It is an arithmetic number, because the mean of its divisors is an integer number (131587428).

Almost surely, 2^523216511 is an apocalyptic number.

523216511 is a deficient number, since it is larger than the sum of its proper divisors (3133201).

523216511 is a wasteful number, since it uses less digits than its factorization.

523216511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133200.

The product of its digits is 1800, while the sum is 26.

The square root of 523216511 is about 22873.9264447536. The cubic root of 523216511 is about 805.7997843302.

Adding to 523216511 its reverse (115612325), we get a palindrome (638828836).

The spelling of 523216511 in words is "five hundred twenty-three million, two hundred sixteen thousand, five hundred eleven".