105361591 has 4 divisors (see below), whose sum is σ = 108760384. Its totient is φ = 101962800.

The previous prime is 105361577. The next prime is 105361637. The reversal of 105361591 is 195163501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105361591 - 2¹¹ = 105359543 is a prime.

It is a super-2 number, since 2×105361591² = 22202129716102562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3398761 = 105361591 / (1 + 0 + 5 + 3 + 6 + 1 + 5 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105361511) 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, 1699350 + ... + 1699411.

It is an arithmetic number, because the mean of its divisors is an integer number (27190096).

Almost surely, 2^105361591 is an apocalyptic number.

105361591 is a deficient number, since it is larger than the sum of its proper divisors (3398793).

105361591 is an equidigital number, since it uses as much as digits as its factorization.

105361591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398792.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 105361591 is about 10264.5794360997. The cubic root of 105361591 is about 472.3103254074.

The spelling of 105361591 in words is "one hundred five million, three hundred sixty-one thousand, five hundred ninety-one".