523011 has 4 divisors (see below), whose sum is σ = 697352. Its totient is φ = 348672.

The previous prime is 523007. The next prime is 523021. The reversal of 523011 is 110325.

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

It is not a de Polignac number, because 523011 - 2² = 523007 is a prime.

It is a super-2 number, since 2×523011² = 547081012242, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

523011 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (523021) 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, 87166 + ... + 87171.

It is an arithmetic number, because the mean of its divisors is an integer number (174338).

2⁵²³⁰¹¹ is an apocalyptic number.

523011 is a deficient number, since it is larger than the sum of its proper divisors (174341).

523011 is a wasteful number, since it uses less digits than its factorization.

523011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174340.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 523011 is about 723.1949944517. The cubic root of 523011 is about 80.5694268798.

Adding to 523011 its reverse (110325), we get a palindrome (633336).

Subtracting from 523011 its reverse (110325), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 523011 in words is "five hundred twenty-three thousand, eleven".