101521543 has 2 divisors, whose sum is σ = 101521544. Its totient is φ = 101521542.

The previous prime is 101521531. The next prime is 101521561. The reversal of 101521543 is 345125101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101521543 - 2⁹ = 101521031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101521583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50760771 + 50760772.

It is an arithmetic number, because the mean of its divisors is an integer number (50760772).

Almost surely, 2^101521543 is an apocalyptic number.

101521543 is a deficient number, since it is larger than the sum of its proper divisors (1).

101521543 is an equidigital number, since it uses as much as digits as its factorization.

101521543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 101521543 is about 10075.7899442178. The cubic root of 101521543 is about 466.5011692632.

Adding to 101521543 its reverse (345125101), we get a palindrome (446646644).

The spelling of 101521543 in words is "one hundred one million, five hundred twenty-one thousand, five hundred forty-three".