211442131 has 2 divisors, whose sum is σ = 211442132. Its totient is φ = 211442130.

The previous prime is 211442113. The next prime is 211442159. The reversal of 211442131 is 131244112.

Together with previous prime (211442113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211442131 - 2⁷ = 211442003 is a prime.

It is a super-2 number, since 2×211442131² = 89415549523642322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211442099 and 211442108.

It is not a weakly prime, because it can be changed into another prime (211442111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105721065 + 105721066.

It is an arithmetic number, because the mean of its divisors is an integer number (105721066).

Almost surely, 2^211442131 is an apocalyptic number.

211442131 is a deficient number, since it is larger than the sum of its proper divisors (1).

211442131 is an equidigital number, since it uses as much as digits as its factorization.

211442131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 211442131 is about 14541.0498589338. The cubic root of 211442131 is about 595.7497137982.

Adding to 211442131 its reverse (131244112), we get a palindrome (342686243).

The spelling of 211442131 in words is "two hundred eleven million, four hundred forty-two thousand, one hundred thirty-one".