212323031 has 2 divisors, whose sum is σ = 212323032. Its totient is φ = 212323030.

The previous prime is 212322991. The next prime is 212323039. The reversal of 212323031 is 130323212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212323031 - 2¹⁸ = 212060887 is a prime.

It is a super-2 number, since 2×212323031² = 90162138986053922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212323039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106161515 + 106161516.

It is an arithmetic number, because the mean of its divisors is an integer number (106161516).

Almost surely, 2^212323031 is an apocalyptic number.

212323031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212323031 is an equidigital number, since it uses as much as digits as its factorization.

212323031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 212323031 is about 14571.3084861999. The cubic root of 212323031 is about 596.5758954260.

Adding to 212323031 its reverse (130323212), we get a palindrome (342646243).

The spelling of 212323031 in words is "two hundred twelve million, three hundred twenty-three thousand, thirty-one".