212403377 has 2 divisors, whose sum is σ = 212403378. Its totient is φ = 212403376.

The previous prime is 212403371. The next prime is 212403409. The reversal of 212403377 is 773304212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191573281 + 20830096 = 13841^2 + 4564^2 .

It is a cyclic number.

It is not a de Polignac number, because 212403377 - 2⁶ = 212403313 is a prime.

It is a super-2 number, since 2×212403377² = 90230389122008258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212403371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106201688 + 106201689.

It is an arithmetic number, because the mean of its divisors is an integer number (106201689).

Almost surely, 2^212403377 is an apocalyptic number.

It is an amenable number.

212403377 is a deficient number, since it is larger than the sum of its proper divisors (1).

212403377 is an equidigital number, since it uses as much as digits as its factorization.

212403377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 212403377 is about 14574.0652187370. The cubic root of 212403377 is about 596.6511368193.

Adding to 212403377 its reverse (773304212), we get a palindrome (985707589).

The spelling of 212403377 in words is "two hundred twelve million, four hundred three thousand, three hundred seventy-seven".