513031023 has 16 divisors (see below), whose sum is σ = 760687200. Its totient is φ = 341732160.

The previous prime is 513031009. The next prime is 513031037. The reversal of 513031023 is 320130315.

It is an interprime number because it is at equal distance from previous prime (513031009) and next prime (513031037).

It is not a de Polignac number, because 513031023 - 2⁸ = 513030767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513030987 and 513031005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513031003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27433 + ... + 42173.

It is an arithmetic number, because the mean of its divisors is an integer number (47542950).

Almost surely, 2^513031023 is an apocalyptic number.

513031023 is a deficient number, since it is larger than the sum of its proper divisors (247656177).

513031023 is a wasteful number, since it uses less digits than its factorization.

513031023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16039 (or 16033 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 513031023 is about 22650.1881449139. The cubic root of 513031023 is about 800.5366310992.

Adding to 513031023 its reverse (320130315), we get a palindrome (833161338).

It can be divided in two parts, 51303 and 1023, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 513031023 in words is "five hundred thirteen million, thirty-one thousand, twenty-three".