105517131477 has 4 divisors (see below), whose sum is σ = 140689508640. Its totient is φ = 70344754316.

The previous prime is 105517131443. The next prime is 105517131481. The reversal of 105517131477 is 774131715501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105517131477 - 2⁸ = 105517131221 is a prime.

It is a super-2 number, since 2×105517131477² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105517131677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17586188577 + ... + 17586188582.

It is an arithmetic number, because the mean of its divisors is an integer number (35172377160).

Almost surely, 2^105517131477 is an apocalyptic number.

It is an amenable number.

105517131477 is a deficient number, since it is larger than the sum of its proper divisors (35172377163).

105517131477 is an equidigital number, since it uses as much as digits as its factorization.

105517131477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35172377162.

The product of its (nonzero) digits is 102900, while the sum is 42.

Adding to 105517131477 its reverse (774131715501), we get a palindrome (879648846978).

The spelling of 105517131477 in words is "one hundred five billion, five hundred seventeen million, one hundred thirty-one thousand, four hundred seventy-seven".