212440507 has 2 divisors, whose sum is σ = 212440508. Its totient is φ = 212440506.

The previous prime is 212440499. The next prime is 212440513. The reversal of 212440507 is 705044212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212440507 - 2³ = 212440499 is a prime.

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, 106220253 + 106220254.

It is an arithmetic number, because the mean of its divisors is an integer number (106220254).

Almost surely, 2^212440507 is an apocalyptic number.

212440507 is a deficient number, since it is larger than the sum of its proper divisors (1).

212440507 is an equidigital number, since it uses as much as digits as its factorization.

212440507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 212440507 is about 14575.3390012034. The cubic root of 212440507 is about 596.6859014360.

Adding to 212440507 its reverse (705044212), we get a palindrome (917484719).

The spelling of 212440507 in words is "two hundred twelve million, four hundred forty thousand, five hundred seven".