105521649 has 16 divisors (see below), whose sum is σ = 148684800. Its totient is φ = 66382416.

The previous prime is 105521641. The next prime is 105521653. The reversal of 105521649 is 946125501.

It is not a de Polignac number, because 105521649 - 2³ = 105521641 is a prime.

It is a super-2 number, since 2×105521649² = 22269636815358402, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105521641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11472 + ... + 18510.

It is an arithmetic number, because the mean of its divisors is an integer number (9292800).

Almost surely, 2^105521649 is an apocalyptic number.

105521649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

105521649 is a deficient number, since it is larger than the sum of its proper divisors (43163151).

105521649 is a wasteful number, since it uses less digits than its factorization.

105521649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 105521649 is about 10272.3730948598. The cubic root of 105521649 is about 472.5493713982.

The spelling of 105521649 in words is "one hundred five million, five hundred twenty-one thousand, six hundred forty-nine".