509621712225 has 12 divisors (see below), whose sum is σ = 842574564336. Its totient is φ = 271798246480.

The previous prime is 509621712221. The next prime is 509621712247. The reversal of 509621712225 is 522217126905.

It is not a de Polignac number, because 509621712225 - 2² = 509621712221 is a prime.

It is a super-2 number, since 2×509621712225² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (509621712221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3397478007 + ... + 3397478156.

It is an arithmetic number, because the mean of its divisors is an integer number (70214547028).

Almost surely, 2^509621712225 is an apocalyptic number.

It is an amenable number.

509621712225 is a deficient number, since it is larger than the sum of its proper divisors (332952852111).

509621712225 is a wasteful number, since it uses less digits than its factorization.

509621712225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6794956176 (or 6794956171 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 509621712225 in words is "five hundred nine billion, six hundred twenty-one million, seven hundred twelve thousand, two hundred twenty-five".