213442444177 has 2 divisors, whose sum is σ = 213442444178. Its totient is φ = 213442444176.

The previous prime is 213442444109. The next prime is 213442444183. The reversal of 213442444177 is 771444244312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212148675216 + 1293768961 = 460596^2 + 35969^2 .

It is a cyclic number.

It is not a de Polignac number, because 213442444177 - 2¹⁵ = 213442411409 is a prime.

It is a super-2 number, since 2×213442444177² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213442144177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721222088 + 106721222089.

It is an arithmetic number, because the mean of its divisors is an integer number (106721222089).

Almost surely, 2^213442444177 is an apocalyptic number.

It is an amenable number.

213442444177 is a deficient number, since it is larger than the sum of its proper divisors (1).

213442444177 is an equidigital number, since it uses as much as digits as its factorization.

213442444177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 43.

Adding to 213442444177 its reverse (771444244312), we get a palindrome (984886688489).

The spelling of 213442444177 in words is "two hundred thirteen billion, four hundred forty-two million, four hundred forty-four thousand, one hundred seventy-seven".