105161551 has 4 divisors (see below), whose sum is σ = 114721704. Its totient is φ = 95601400.

The previous prime is 105161549. The next prime is 105161557. The reversal of 105161551 is 155161501.

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

It is a cyclic number.

It is not a de Polignac number, because 105161551 - 2¹ = 105161549 is a prime.

It is a super-2 number, since 2×105161551² = 22117903617451202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105161557) 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 3 ways as a sum of consecutive naturals, for example, 4780060 + ... + 4780081.

It is an arithmetic number, because the mean of its divisors is an integer number (28680426).

Almost surely, 2^105161551 is an apocalyptic number.

105161551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

105161551 is a deficient number, since it is larger than the sum of its proper divisors (9560153).

105161551 is an equidigital number, since it uses as much as digits as its factorization.

105161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9560152.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 105161551 is about 10254.8306178113. The cubic root of 105161551 is about 472.0112258534.

The spelling of 105161551 in words is "one hundred five million, one hundred sixty-one thousand, five hundred fifty-one".