212317557471 has 12 divisors (see below), whose sum is σ = 311878898760. Its totient is φ = 139145969520.

The previous prime is 212317557467. The next prime is 212317557509. The reversal of 212317557471 is 174755713212.

212317557471 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 1 + 7 + 5 + 574 + 71 = 666.

It is not a de Polignac number, because 212317557471 - 2² = 212317557467 is a prime.

It is a super-3 number, since 3×212317557471³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212317557461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199921840 + ... + 199922901.

It is an arithmetic number, because the mean of its divisors is an integer number (25989908230).

Almost surely, 2^212317557471 is an apocalyptic number.

212317557471 is a deficient number, since it is larger than the sum of its proper divisors (99561341289).

212317557471 is a wasteful number, since it uses less digits than its factorization.

212317557471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399844806 (or 399844803 counting only the distinct ones).

The product of its digits is 411600, while the sum is 45.

The spelling of 212317557471 in words is "two hundred twelve billion, three hundred seventeen million, five hundred fifty-seven thousand, four hundred seventy-one".