515223423 has 48 divisors (see below), whose sum is σ = 906761856. Its totient is φ = 288217440.

The previous prime is 515223419. The next prime is 515223427. The reversal of 515223423 is 324322515.

It is a happy number.

515223423 is a `hidden beast` number, since 5 + 15 + 223 + 423 = 666.

It is an interprime number because it is at equal distance from previous prime (515223419) and next prime (515223427).

It is not a de Polignac number, because 515223423 - 2² = 515223419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515223427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27336 + ... + 42162.

It is an arithmetic number, because the mean of its divisors is an integer number (18890872).

Almost surely, 2^515223423 is an apocalyptic number.

515223423 is a deficient number, since it is larger than the sum of its proper divisors (391538433).

515223423 is a wasteful number, since it uses less digits than its factorization.

515223423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14866 (or 14854 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 515223423 is about 22698.5334988849. The cubic root of 515223423 is about 801.6753551779.

Adding to 515223423 its reverse (324322515), we get a palindrome (839545938).

It can be divided in two parts, 51522 and 3423, that added together give a palindrome (54945).

The spelling of 515223423 in words is "five hundred fifteen million, two hundred twenty-three thousand, four hundred twenty-three".