105103521 has 16 divisors (see below), whose sum is σ = 156124800. Its totient is φ = 69881904.

The previous prime is 105103519. The next prime is 105103543. The reversal of 105103521 is 125301501.

It is not a de Polignac number, because 105103521 - 2¹ = 105103519 is a prime.

It is a super-2 number, since 2×105103521² = 22093500253194882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105103494 and 105103503.

It is not an unprimeable number, because it can be changed into a prime (105103561) 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, 5500 + ... + 15506.

It is an arithmetic number, because the mean of its divisors is an integer number (9757800).

Almost surely, 2^105103521 is an apocalyptic number.

It is an amenable number.

105103521 is a deficient number, since it is larger than the sum of its proper divisors (51021279).

105103521 is a wasteful number, since it uses less digits than its factorization.

105103521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405 (or 10399 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 105103521 is about 10252.0008291065. Note that the first 3 decimals coincide. The cubic root of 105103521 is about 471.9243885034.

The spelling of 105103521 in words is "one hundred five million, one hundred three thousand, five hundred twenty-one".