105105531242 has 4 divisors (see below), whose sum is σ = 157658296866. Its totient is φ = 52552765620.

The previous prime is 105105531233. The next prime is 105105531247. The reversal of 105105531242 is 242135501501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 97699379761 + 7406151481 = 312569^2 + 86059^2 .

It is a super-2 number, since 2×105105531242² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105105531247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26276382809 + ... + 26276382812.

Almost surely, 2^105105531242 is an apocalyptic number.

105105531242 is a deficient number, since it is larger than the sum of its proper divisors (52552765624).

105105531242 is an equidigital number, since it uses as much as digits as its factorization.

105105531242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52552765623.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 105105531242 in words is "one hundred five billion, one hundred five million, five hundred thirty-one thousand, two hundred forty-two".