211270647949 has 8 divisors (see below), whose sum is σ = 213692166968. Its totient is φ = 208854097920.

The previous prime is 211270647947. The next prime is 211270647961. The reversal of 211270647949 is 949746072112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39081336100 + 172189311849 = 197690^2 + 414957^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211270647949 - 2¹ = 211270647947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211270647896 and 211270647905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211270647947) 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, 1156692 + ... + 1326829.

It is an arithmetic number, because the mean of its divisors is an integer number (26711520871).

Almost surely, 2^211270647949 is an apocalyptic number.

It is an amenable number.

211270647949 is a deficient number, since it is larger than the sum of its proper divisors (2421519019).

211270647949 is an equidigital number, since it uses as much as digits as its factorization.

211270647949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484495.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 211270647949 in words is "two hundred eleven billion, two hundred seventy million, six hundred forty-seven thousand, nine hundred forty-nine".