211103431 has 8 divisors (see below), whose sum is σ = 263193984. Its totient is φ = 164496120.

The previous prime is 211103429. The next prime is 211103449. The reversal of 211103431 is 134301112.

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 211103431 - 2¹ = 211103429 is a prime.

It is a super-2 number, since 2×211103431² = 89129317159943522, which 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 (211103411) 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, 1370725 + ... + 1370878.

It is an arithmetic number, because the mean of its divisors is an integer number (32899248).

Almost surely, 2^211103431 is an apocalyptic number.

211103431 is a deficient number, since it is larger than the sum of its proper divisors (52090553).

211103431 is a wasteful number, since it uses less digits than its factorization.

211103431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741621.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 211103431 is about 14529.3988519828. The cubic root of 211103431 is about 595.4314419001.

Adding to 211103431 its reverse (134301112), we get a palindrome (345404543).

The spelling of 211103431 in words is "two hundred eleven million, one hundred three thousand, four hundred thirty-one".