211252401605 has 8 divisors (see below), whose sum is σ = 289717579392. Its totient is φ = 144858789648.

The previous prime is 211252401593. The next prime is 211252401611. The reversal of 211252401605 is 506104252112.

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 211252401605 - 2¹⁶ = 211252336069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3017891417 + ... + 3017891486.

It is an arithmetic number, because the mean of its divisors is an integer number (36214697424).

Almost surely, 2^211252401605 is an apocalyptic number.

It is an amenable number.

211252401605 is a deficient number, since it is larger than the sum of its proper divisors (78465177787).

211252401605 is an equidigital number, since it uses as much as digits as its factorization.

211252401605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035782915.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 211252401605 its reverse (506104252112), we get a palindrome (717356653717).

The spelling of 211252401605 in words is "two hundred eleven billion, two hundred fifty-two million, four hundred one thousand, six hundred five".