3181213105 has 16 divisors (see below), whose sum is σ = 4364417664. Its totient is φ = 2180597760.

The previous prime is 3181213081. The next prime is 3181213141. The reversal of 3181213105 is 5013121813.

It is not a de Polignac number, because 3181213105 - 2⁷ = 3181212977 is a prime.

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 3181213105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88689 + ... + 119281.

It is an arithmetic number, because the mean of its divisors is an integer number (272776104).

Almost surely, 2^3181213105 is an apocalyptic number.

3181213105 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3181213105 is a deficient number, since it is larger than the sum of its proper divisors (1183204559).

3181213105 is a wasteful number, since it uses less digits than its factorization.

3181213105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33576.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 3181213105 is about 56402.2437940194. The cubic root of 3181213105 is about 1470.7231244071.

Adding to 3181213105 its reverse (5013121813), we get a palindrome (8194334918).

The spelling of 3181213105 in words is "three billion, one hundred eighty-one million, two hundred thirteen thousand, one hundred five".