105510521 has 2 divisors, whose sum is σ = 105510522. Its totient is φ = 105510520.

The previous prime is 105510491. The next prime is 105510533. The reversal of 105510521 is 125015501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 16000000 = 9461^2 + 4000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105510521 is a prime.

It is a super-2 number, since 2×105510521² = 22264940083382882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105510493 and 105510502.

It is not a weakly prime, because it can be changed into another prime (105510571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52755260 + 52755261.

It is an arithmetic number, because the mean of its divisors is an integer number (52755261).

Almost surely, 2^105510521 is an apocalyptic number.

It is an amenable number.

105510521 is a deficient number, since it is larger than the sum of its proper divisors (1).

105510521 is an equidigital number, since it uses as much as digits as its factorization.

105510521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 105510521 is about 10271.8314335857. The cubic root of 105510521 is about 472.5327595961.

The spelling of 105510521 in words is "one hundred five million, five hundred ten thousand, five hundred twenty-one".