211429529917 has 4 divisors (see below), whose sum is σ = 211466518236. Its totient is φ = 211392541600.

The previous prime is 211429529833. The next prime is 211429529933. The reversal of 211429529917 is 719925924112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102416640676 + 109012889241 = 320026^2 + 330171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211429529917 is a prime.

It is a super-2 number, since 2×211429529917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211429529947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18485584 + ... + 18497017.

It is an arithmetic number, because the mean of its divisors is an integer number (52866629559).

Almost surely, 2^211429529917 is an apocalyptic number.

It is an amenable number.

211429529917 is a deficient number, since it is larger than the sum of its proper divisors (36988319).

211429529917 is an equidigital number, since it uses as much as digits as its factorization.

211429529917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36988318.

The product of its digits is 816480, while the sum is 52.

The spelling of 211429529917 in words is "two hundred eleven billion, four hundred twenty-nine million, five hundred twenty-nine thousand, nine hundred seventeen".