210144323381 has 2 divisors, whose sum is σ = 210144323382. Its totient is φ = 210144323380.

The previous prime is 210144323369. The next prime is 210144323461. The reversal of 210144323381 is 183323441012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109041946225 + 101102377156 = 330215^2 + 317966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210144323381 is a prime.

It is a super-2 number, since 2×210144323381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210144323351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105072161690 + 105072161691.

It is an arithmetic number, because the mean of its divisors is an integer number (105072161691).

Almost surely, 2^210144323381 is an apocalyptic number.

It is an amenable number.

210144323381 is a deficient number, since it is larger than the sum of its proper divisors (1).

210144323381 is an equidigital number, since it uses as much as digits as its factorization.

210144323381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 210144323381 its reverse (183323441012), we get a palindrome (393467764393).

The spelling of 210144323381 in words is "two hundred ten billion, one hundred forty-four million, three hundred twenty-three thousand, three hundred eighty-one".