105143212 has 24 divisors (see below), whose sum is σ = 198626400. Its totient is φ = 48550656.

The previous prime is 105143201. The next prime is 105143221. The reversal of 105143212 is 212341501.

It is a super-2 number, since 2×105143212² = 22110190059353888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105143212.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17037 + ... + 22372.

It is an arithmetic number, because the mean of its divisors is an integer number (8276100).

Almost surely, 2^105143212 is an apocalyptic number.

It is an amenable number.

105143212 is a deficient number, since it is larger than the sum of its proper divisors (93483188).

105143212 is a wasteful number, since it uses less digits than its factorization.

105143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39465 (or 39463 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 105143212 is about 10253.9364148604. The cubic root of 105143212 is about 471.9837864296.

Adding to 105143212 its reverse (212341501), we get a palindrome (317484713).

The spelling of 105143212 in words is "one hundred five million, one hundred forty-three thousand, two hundred twelve".