105520031 has 4 divisors (see below), whose sum is σ = 105577272. Its totient is φ = 105462792.

The previous prime is 105519991. The next prime is 105520039. The reversal of 105520031 is 130025501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130025501 = 31 ⋅4194371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105520031 is a prime.

It is a super-2 number, since 2×105520031² = 22268953884481922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105519991 and 105520009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105520039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25760 + ... + 29573.

It is an arithmetic number, because the mean of its divisors is an integer number (26394318).

Almost surely, 2^105520031 is an apocalyptic number.

105520031 is a deficient number, since it is larger than the sum of its proper divisors (57241).

105520031 is an equidigital number, since it uses as much as digits as its factorization.

105520031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57240.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 105520031 is about 10272.2943396303. The cubic root of 105520031 is about 472.5469561315.

Adding to 105520031 its reverse (130025501), we get a palindrome (235545532).

The spelling of 105520031 in words is "one hundred five million, five hundred twenty thousand, thirty-one".