212440531 has 2 divisors, whose sum is σ = 212440532. Its totient is φ = 212440530.

The previous prime is 212440523. The next prime is 212440537. The reversal of 212440531 is 135044212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212440531 - 2³ = 212440523 is a prime.

It is a super-2 number, since 2×212440531² = 90261958423123922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212440537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106220265 + 106220266.

It is an arithmetic number, because the mean of its divisors is an integer number (106220266).

Almost surely, 2^212440531 is an apocalyptic number.

212440531 is a deficient number, since it is larger than the sum of its proper divisors (1).

212440531 is an equidigital number, since it uses as much as digits as its factorization.

212440531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 212440531 is about 14575.3398245118. The cubic root of 212440531 is about 596.6859239057.

Adding to 212440531 its reverse (135044212), we get a palindrome (347484743).

The spelling of 212440531 in words is "two hundred twelve million, four hundred forty thousand, five hundred thirty-one".