101543521 has 4 divisors (see below), whose sum is σ = 101578752. Its totient is φ = 101508292.

The previous prime is 101543483. The next prime is 101543537. The reversal of 101543521 is 125345101.

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.

It is a cyclic number.

It is not a de Polignac number, because 101543521 - 2⁹ = 101543009 is a prime.

It is a super-2 number, since 2×101543521² = 20622173314154882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101543492 and 101543501.

It is not an unprimeable number, because it can be changed into a prime (101543591) 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 in 3 ways as a sum of consecutive naturals, for example, 12865 + ... + 19198.

It is an arithmetic number, because the mean of its divisors is an integer number (25394688).

Almost surely, 2^101543521 is an apocalyptic number.

It is an amenable number.

101543521 is a deficient number, since it is larger than the sum of its proper divisors (35231).

101543521 is an equidigital number, since it uses as much as digits as its factorization.

101543521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35230.

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

The square root of 101543521 is about 10076.8805192877. The cubic root of 101543521 is about 466.5348305028.

Adding to 101543521 its reverse (125345101), we get a palindrome (226888622).

The spelling of 101543521 in words is "one hundred one million, five hundred forty-three thousand, five hundred twenty-one".