105145631 has 4 divisors (see below), whose sum is σ = 105168000. Its totient is φ = 105123264.

The previous prime is 105145597. The next prime is 105145633. The reversal of 105145631 is 136541501.

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 105145631 - 2⁶ = 105145567 is a prime.

It is a super-2 number, since 2×105145631² = 22111207436776322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105145631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105145633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106 + ... + 14543.

It is an arithmetic number, because the mean of its divisors is an integer number (26292000).

Almost surely, 2^105145631 is an apocalyptic number.

105145631 is a deficient number, since it is larger than the sum of its proper divisors (22369).

105145631 is an equidigital number, since it uses as much as digits as its factorization.

105145631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22368.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 105145631 is about 10254.0543688826. The cubic root of 105145631 is about 471.9874060007.

The spelling of 105145631 in words is "one hundred five million, one hundred forty-five thousand, six hundred thirty-one".