105881631 has 8 divisors (see below), whose sum is σ = 142546560. Its totient is φ = 69902232.

The previous prime is 105881617. The next prime is 105881681. The reversal of 105881631 is 136188501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105881631 - 2⁵ = 105881599 is a prime.

It is a super-2 number, since 2×105881631² = 22421839566440322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105881592 and 105881601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105881681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171021 + ... + 171638.

It is an arithmetic number, because the mean of its divisors is an integer number (17818320).

Almost surely, 2^105881631 is an apocalyptic number.

105881631 is a deficient number, since it is larger than the sum of its proper divisors (36664929).

105881631 is a wasteful number, since it uses less digits than its factorization.

105881631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342765.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 105881631 is about 10289.8800284551. The cubic root of 105881631 is about 473.0861212670.

The spelling of 105881631 in words is "one hundred five million, eight hundred eighty-one thousand, six hundred thirty-one".