211142031 has 4 divisors (see below), whose sum is σ = 281522712. Its totient is φ = 140761352.

The previous prime is 211141999. The next prime is 211142033. The reversal of 211142031 is 130241112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211142031 - 2⁵ = 211141999 is a prime.

It is a super-2 number, since 2×211142031² = 89161914509609922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211142031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211142033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35190336 + ... + 35190341.

It is an arithmetic number, because the mean of its divisors is an integer number (70380678).

Almost surely, 2^211142031 is an apocalyptic number.

211142031 is a deficient number, since it is larger than the sum of its proper divisors (70380681).

211142031 is an equidigital number, since it uses as much as digits as its factorization.

211142031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70380680.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 211142031 is about 14530.7271325285. The cubic root of 211142031 is about 595.4677309881.

Adding to 211142031 its reverse (130241112), we get a palindrome (341383143).

The spelling of 211142031 in words is "two hundred eleven million, one hundred forty-two thousand, thirty-one".