517212220551 has 8 divisors (see below), whose sum is σ = 742663701360. Its totient is φ = 318284443392.

The previous prime is 517212220543. The next prime is 517212220583. The reversal of 517212220551 is 155022212715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 517212220551 - 2³ = 517212220543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517212220351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6630925866 + ... + 6630925943.

It is an arithmetic number, because the mean of its divisors is an integer number (92832962670).

Almost surely, 2^517212220551 is an apocalyptic number.

517212220551 is a deficient number, since it is larger than the sum of its proper divisors (225451480809).

517212220551 is a wasteful number, since it uses less digits than its factorization.

517212220551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13261851825.

The product of its (nonzero) digits is 14000, while the sum is 33.

The spelling of 517212220551 in words is "five hundred seventeen billion, two hundred twelve million, two hundred twenty thousand, five hundred fifty-one".