812172100519 has 16 divisors (see below), whose sum is σ = 878315205600. Its totient is φ = 746558816256.

The previous prime is 812172100457. The next prime is 812172100661. The reversal of 812172100519 is 915001271218.

It is a cyclic number.

It is not a de Polignac number, because 812172100519 - 2¹⁷ = 812171969447 is a prime.

It is a super-3 number, since 3×812172100519³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812172100319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3271527 + ... + 3511015.

It is an arithmetic number, because the mean of its divisors is an integer number (54894700350).

Almost surely, 2^812172100519 is an apocalyptic number.

812172100519 is a deficient number, since it is larger than the sum of its proper divisors (66143105081).

812172100519 is a wasteful number, since it uses less digits than its factorization.

812172100519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240594.

The product of its (nonzero) digits is 10080, while the sum is 37.

The spelling of 812172100519 in words is "eight hundred twelve billion, one hundred seventy-two million, one hundred thousand, five hundred nineteen".