31486105 has 16 divisors (see below), whose sum is σ = 44187264. Its totient is φ = 21087360.

The previous prime is 31486087. The next prime is 31486109. The reversal of 31486105 is 50168413.

It is not a de Polignac number, because 31486105 - 2¹⁹ = 30961817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31486109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8956 + ... + 11965.

It is an arithmetic number, because the mean of its divisors is an integer number (2761704).

Almost surely, 2^31486105 is an apocalyptic number.

31486105 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31486105 is a deficient number, since it is larger than the sum of its proper divisors (12701159).

31486105 is a wasteful number, since it uses less digits than its factorization.

31486105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20976.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 31486105 is about 5611.2480786363. The cubic root of 31486105 is about 315.7715361132.

The spelling of 31486105 in words is "thirty-one million, four hundred eighty-six thousand, one hundred five".