8153521 has 2 divisors, whose sum is σ = 8153522. Its totient is φ = 8153520.

The previous prime is 8153491. The next prime is 8153539. The reversal of 8153521 is 1253518.

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., 4562496 + 3591025 = 2136^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 8153521 - 2⁹ = 8153009 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (8153581) 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 as a sum of consecutive naturals, namely, 4076760 + 4076761.

It is an arithmetic number, because the mean of its divisors is an integer number (4076761).

Almost surely, 2^8153521 is an apocalyptic number.

It is an amenable number.

8153521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8153521 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 14 representation: 8153521 = (1123585)₁₄.

8153521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 8153521 is about 2855.4370943868. The cubic root of 8153521 is about 201.2712442370.

The spelling of 8153521 in words is "eight million, one hundred fifty-three thousand, five hundred twenty-one".