211571707153 has 4 divisors (see below), whose sum is σ = 211826921140. Its totient is φ = 211316493168.

The previous prime is 211571707147. The next prime is 211571707157. The reversal of 211571707153 is 351707175112.

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 146652234304 + 64919472849 = 382952^2 + 254793^2 .

It is a cyclic number.

It is not a de Polignac number, because 211571707153 - 2⁵ = 211571707121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211571707157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127605750 + ... + 127607407.

It is an arithmetic number, because the mean of its divisors is an integer number (52956730285).

Almost surely, 2^211571707153 is an apocalyptic number.

It is an amenable number.

211571707153 is a deficient number, since it is larger than the sum of its proper divisors (255213987).

211571707153 is an equidigital number, since it uses as much as digits as its factorization.

211571707153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255213986.

The product of its (nonzero) digits is 51450, while the sum is 40.

The spelling of 211571707153 in words is "two hundred eleven billion, five hundred seventy-one million, seven hundred seven thousand, one hundred fifty-three".