515023 has 4 divisors (see below), whose sum is σ = 523528. Its totient is φ = 506520.

The previous prime is 514967. The next prime is 515041. The reversal of 515023 is 320515.

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 515023 - 2¹⁷ = 383951 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 514988 and 515006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515323) 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, 4161 + ... + 4282.

It is an arithmetic number, because the mean of its divisors is an integer number (130882).

2⁵¹⁵⁰²³ is an apocalyptic number.

515023 is a deficient number, since it is larger than the sum of its proper divisors (8505).

515023 is an equidigital number, since it uses as much as digits as its factorization.

515023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 515023 is about 717.6510294008. The cubic root of 515023 is about 80.1571390560.

Adding to 515023 its reverse (320515), we get a palindrome (835538).

The spelling of 515023 in words is "five hundred fifteen thousand, twenty-three".