105665506031 has 4 divisors (see below), whose sum is σ = 109309144200. Its totient is φ = 102021867864.

The previous prime is 105665506021. The next prime is 105665506039. The reversal of 105665506031 is 130605566501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130605566501 = 79 ⋅1653235019.

It is a cyclic number.

It is not a de Polignac number, because 105665506031 - 2¹⁴ = 105665489647 is a prime.

It is a super-2 number, since 2×105665506031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105665506039) 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, 1821819041 + ... + 1821819098.

It is an arithmetic number, because the mean of its divisors is an integer number (27327286050).

Almost surely, 2^105665506031 is an apocalyptic number.

105665506031 is a deficient number, since it is larger than the sum of its proper divisors (3643638169).

105665506031 is an equidigital number, since it uses as much as digits as its factorization.

105665506031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643638168.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 105665506031 in words is "one hundred five billion, six hundred sixty-five million, five hundred six thousand, thirty-one".