100055381 has 2 divisors, whose sum is σ = 100055382. Its totient is φ = 100055380.

The previous prime is 100055369. The next prime is 100055393. The reversal of 100055381 is 183550001.

It is a balanced prime because it is at equal distance from previous prime (100055369) and next prime (100055393).

It can be written as a sum of positive squares in only one way, i.e., 99400900 + 654481 = 9970^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 100055381 - 2¹⁴ = 100038997 is a prime.

It is a super-2 number, since 2×100055381² = 20022158534110322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100055341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50027690 + 50027691.

It is an arithmetic number, because the mean of its divisors is an integer number (50027691).

Almost surely, 2^100055381 is an apocalyptic number.

It is an amenable number.

100055381 is a deficient number, since it is larger than the sum of its proper divisors (1).

100055381 is an equidigital number, since it uses as much as digits as its factorization.

100055381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 100055381 is about 10002.7686667242. The cubic root of 100055381 is about 464.2445528254.

The spelling of 100055381 in words is "one hundred million, fifty-five thousand, three hundred eighty-one".