105631785431306 has 4 divisors (see below), whose sum is σ = 158447678146962. Its totient is φ = 52815892715652.

The previous prime is 105631785431243. The next prime is 105631785431311. The reversal of 105631785431306 is 603134587136501.

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., 105115622213281 + 516163218025 = 10252591^2 + 718445^2 .

It is a super-2 number, since 2×105631785431306² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26407946357825 + ... + 26407946357828.

Almost surely, 2^{105631785431306} is an apocalyptic number.

105631785431306 is a deficient number, since it is larger than the sum of its proper divisors (52815892715656).

105631785431306 is an equidigital number, since it uses as much as digits as its factorization.

105631785431306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52815892715655.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 105631785431306 in words is "one hundred five trillion, six hundred thirty-one billion, seven hundred eighty-five million, four hundred thirty-one thousand, three hundred six".