211660242431 has 8 divisors (see below), whose sum is σ = 230911359744. Its totient is φ = 192410671320.

The previous prime is 211660242407. The next prime is 211660242461. The reversal of 211660242431 is 134242066112.

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 211660242431 - 2¹⁴ = 211660226047 is a prime.

It is a super-2 number, since 2×211660242431² (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 (211660242461) 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, 90455 + ... + 656888.

It is an arithmetic number, because the mean of its divisors is an integer number (28863919968).

Almost surely, 2^211660242431 is an apocalyptic number.

211660242431 is a deficient number, since it is larger than the sum of its proper divisors (19251117313).

211660242431 is a wasteful number, since it uses less digits than its factorization.

211660242431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773101.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 211660242431 in words is "two hundred eleven billion, six hundred sixty million, two hundred forty-two thousand, four hundred thirty-one".