105153521 has 4 divisors (see below), whose sum is σ = 114712944. Its totient is φ = 95594100.

The previous prime is 105153511. The next prime is 105153553. The reversal of 105153521 is 125351501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125351501 = 11 ⋅11395591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105153521 is a prime.

It is a super-2 number, since 2×105153521² = 22114525957394882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105153511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4779695 + ... + 4779716.

It is an arithmetic number, because the mean of its divisors is an integer number (28678236).

Almost surely, 2^105153521 is an apocalyptic number.

105153521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105153521 is a deficient number, since it is larger than the sum of its proper divisors (9559423).

105153521 is an equidigital number, since it uses as much as digits as its factorization.

105153521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9559422.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 105153521 is about 10254.4390875367. The cubic root of 105153521 is about 471.9992114920. Note that the first 3 decimals are identical.

The spelling of 105153521 in words is "one hundred five million, one hundred fifty-three thousand, five hundred twenty-one".