105521651 has 4 divisors (see below), whose sum is σ = 106230000. Its totient is φ = 104813304.

The previous prime is 105521641. The next prime is 105521653. The reversal of 105521651 is 156125501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105521651 is a prime.

It is a super-2 number, since 2×105521651² = 22269637659531602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105521651.

It is not an unprimeable number, because it can be changed into a prime (105521653) 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, 353951 + ... + 354248.

It is an arithmetic number, because the mean of its divisors is an integer number (26557500).

Almost surely, 2^105521651 is an apocalyptic number.

105521651 is a deficient number, since it is larger than the sum of its proper divisors (708349).

105521651 is an equidigital number, since it uses as much as digits as its factorization.

105521651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708348.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 105521651 is about 10272.3731922083. The cubic root of 105521651 is about 472.5493743837.

The spelling of 105521651 in words is "one hundred five million, five hundred twenty-one thousand, six hundred fifty-one".