515020231 has 8 divisors (see below), whose sum is σ = 564784128. Its totient is φ = 465747000.

The previous prime is 515020217. The next prime is 515020237. The reversal of 515020231 is 132020515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 515020231 - 2¹¹ = 515018183 is a prime.

It is a super-2 number, since 2×515020231² = 530491676678586722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 515020199 and 515020208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515020237) 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 7 ways as a sum of consecutive naturals, for example, 120465 + ... + 124666.

It is an arithmetic number, because the mean of its divisors is an integer number (70598016).

Almost surely, 2^515020231 is an apocalyptic number.

515020231 is a deficient number, since it is larger than the sum of its proper divisors (49763897).

515020231 is a wasteful number, since it uses less digits than its factorization.

515020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245333.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 515020231 is about 22694.0571736303. The cubic root of 515020231 is about 801.5699540192.

Adding to 515020231 its reverse (132020515), we get a palindrome (647040746).

The spelling of 515020231 in words is "five hundred fifteen million, twenty thousand, two hundred thirty-one".