105221535243 has 32 divisors (see below), whose sum is σ = 156347476992. Its totient is φ = 62397196800.

The previous prime is 105221535239. The next prime is 105221535247. The reversal of 105221535243 is 342535122501.

It is an interprime number because it is at equal distance from previous prime (105221535239) and next prime (105221535247).

It is not a de Polignac number, because 105221535243 - 2² = 105221535239 is a prime.

It is a super-2 number, since 2×105221535243² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (105221535247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8265123 + ... + 8277843.

It is an arithmetic number, because the mean of its divisors is an integer number (4885858656).

Almost surely, 2^105221535243 is an apocalyptic number.

105221535243 is a deficient number, since it is larger than the sum of its proper divisors (51125941749).

105221535243 is a wasteful number, since it uses less digits than its factorization.

105221535243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18115.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 105221535243 its reverse (342535122501), we get a palindrome (447756657744).

The spelling of 105221535243 in words is "one hundred five billion, two hundred twenty-one million, five hundred thirty-five thousand, two hundred forty-three".