515520234 has 16 divisors (see below), whose sum is σ = 1145600640. Its totient is φ = 171840060.

The previous prime is 515520199. The next prime is 515520283. The reversal of 515520234 is 432025515.

It is a happy number.

It is a super-2 number, since 2×515520234² = 531522223326829512, which contains 22 as substring.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 515520198 and 515520207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4773282 + ... + 4773389.

It is an arithmetic number, because the mean of its divisors is an integer number (71600040).

Almost surely, 2^515520234 is an apocalyptic number.

515520234 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

515520234 is an abundant number, since it is smaller than the sum of its proper divisors (630080406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515520234 is a wasteful number, since it uses less digits than its factorization.

515520234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9546682 (or 9546676 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 515520234 is about 22705.0706671439. The cubic root of 515520234 is about 801.8292692378.

Adding to 515520234 its reverse (432025515), we get a palindrome (947545749).

The spelling of 515520234 in words is "five hundred fifteen million, five hundred twenty thousand, two hundred thirty-four".