105520381 has 2 divisors, whose sum is σ = 105520382. Its totient is φ = 105520380.

The previous prime is 105520367. The next prime is 105520391. The reversal of 105520381 is 183025501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86676100 + 18844281 = 9310^2 + 4341^2 .

It is a cyclic number.

It is not a de Polignac number, because 105520381 - 2¹¹ = 105518333 is a prime.

It is a super-2 number, since 2×105520381² = 22269101612770322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105520351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52760190 + 52760191.

It is an arithmetic number, because the mean of its divisors is an integer number (52760191).

Almost surely, 2^105520381 is an apocalyptic number.

It is an amenable number.

105520381 is a deficient number, since it is larger than the sum of its proper divisors (1).

105520381 is an equidigital number, since it uses as much as digits as its factorization.

105520381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 105520381 is about 10272.3113757323. The cubic root of 105520381 is about 472.5474785955.

Adding to 105520381 its reverse (183025501), we get a palindrome (288545882).

The spelling of 105520381 in words is "one hundred five million, five hundred twenty thousand, three hundred eighty-one".