515230023 has 16 divisors (see below), whose sum is σ = 856486656. Its totient is φ = 267651840.

The previous prime is 515230019. The next prime is 515230043. The reversal of 515230023 is 320032515.

It is not a de Polignac number, because 515230023 - 2² = 515230019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515230043) 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 15 ways as a sum of consecutive naturals, for example, 1114986 + ... + 1115447.

It is an arithmetic number, because the mean of its divisors is an integer number (53530416).

Almost surely, 2^515230023 is an apocalyptic number.

515230023 is a deficient number, since it is larger than the sum of its proper divisors (341256633).

515230023 is a wasteful number, since it uses less digits than its factorization.

515230023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230454.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 515230023 is about 22698.6788822610. The cubic root of 515230023 is about 801.6787783108.

Adding to 515230023 its reverse (320032515), we get a palindrome (835262538).

The spelling of 515230023 in words is "five hundred fifteen million, two hundred thirty thousand, twenty-three".