105145551 has 24 divisors (see below), whose sum is σ = 173925024. Its totient is φ = 59961600.

The previous prime is 105145543. The next prime is 105145553. The reversal of 105145551 is 155541501.

105145551 is a `hidden beast` number, since 105 + 1 + 4 + 5 + 551 = 666.

It is not a de Polignac number, because 105145551 - 2³ = 105145543 is a prime.

It is a super-2 number, since 2×105145551² = 22111173790187202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105145553) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 36475 + ... + 39251.

It is an arithmetic number, because the mean of its divisors is an integer number (7246876).

Almost surely, 2^105145551 is an apocalyptic number.

105145551 is a deficient number, since it is larger than the sum of its proper divisors (68779473).

105145551 is a wasteful number, since it uses less digits than its factorization.

105145551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391 (or 3388 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 105145551 is about 10254.0504679858. The cubic root of 105145551 is about 471.9872862969.

The spelling of 105145551 in words is "one hundred five million, one hundred forty-five thousand, five hundred fifty-one".