213126377 has 2 divisors, whose sum is σ = 213126378. Its totient is φ = 213126376.

The previous prime is 213126373. The next prime is 213126427. The reversal of 213126377 is 773621312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134467216 + 78659161 = 11596^2 + 8869^2 .

It is a cyclic number.

It is not a de Polignac number, because 213126377 - 2² = 213126373 is a prime.

It is a super-2 number, since 2×213126377² = 90845705146292258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213126371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106563188 + 106563189.

It is an arithmetic number, because the mean of its divisors is an integer number (106563189).

Almost surely, 2^213126377 is an apocalyptic number.

It is an amenable number.

213126377 is a deficient number, since it is larger than the sum of its proper divisors (1).

213126377 is an equidigital number, since it uses as much as digits as its factorization.

213126377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 32.

The square root of 213126377 is about 14598.8484819865. The cubic root of 213126377 is about 597.3273505479.

Adding to 213126377 its reverse (773621312), we get a palindrome (986747689).

The spelling of 213126377 in words is "two hundred thirteen million, one hundred twenty-six thousand, three hundred seventy-seven".