212403307 has 2 divisors, whose sum is σ = 212403308. Its totient is φ = 212403306.

The previous prime is 212403283. The next prime is 212403311. The reversal of 212403307 is 703304212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212403307 - 2⁷ = 212403179 is a prime.

It is not a weakly prime, because it can be changed into another prime (212403377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106201653 + 106201654.

It is an arithmetic number, because the mean of its divisors is an integer number (106201654).

Almost surely, 2^212403307 is an apocalyptic number.

212403307 is a deficient number, since it is larger than the sum of its proper divisors (1).

212403307 is an equidigital number, since it uses as much as digits as its factorization.

212403307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 212403307 is about 14574.0628172106. The cubic root of 212403307 is about 596.6510712748.

Adding to 212403307 its reverse (703304212), we get a palindrome (915707519).

The spelling of 212403307 in words is "two hundred twelve million, four hundred three thousand, three hundred seven".