520215612 has 24 divisors (see below), whose sum is σ = 1387241856. Its totient is φ = 148633008.

The previous prime is 520215607. The next prime is 520215637. The reversal of 520215612 is 216512025.

It is a happy number.

It is a congruent number.

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, 3096438 + ... + 3096605.

It is an arithmetic number, because the mean of its divisors is an integer number (57801744).

Almost surely, 2^520215612 is an apocalyptic number.

It is an amenable number.

520215612 is an abundant number, since it is smaller than the sum of its proper divisors (867026244).

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

520215612 is a wasteful number, since it uses less digits than its factorization.

520215612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193057 (or 6193055 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 520215612 is about 22808.2356178640. The cubic root of 520215612 is about 804.2562795295.

Adding to 520215612 its reverse (216512025), we get a palindrome (736727637).

The spelling of 520215612 in words is "five hundred twenty million, two hundred fifteen thousand, six hundred twelve".