103531521 has 8 divisors (see below), whose sum is σ = 138205440. Its totient is φ = 68939312.

The previous prime is 103531517. The next prime is 103531523. The reversal of 103531521 is 125135301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103531521 - 2² = 103531517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103531523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17406 + ... + 22583.

It is an arithmetic number, because the mean of its divisors is an integer number (17275680).

Almost surely, 2^103531521 is an apocalyptic number.

It is an amenable number.

103531521 is a deficient number, since it is larger than the sum of its proper divisors (34673919).

103531521 is an equidigital number, since it uses as much as digits as its factorization.

103531521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40855.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 103531521 is about 10175.0440293888. The cubic root of 103531521 is about 469.5597522285.

Adding to 103531521 its reverse (125135301), we get a palindrome (228666822).

The spelling of 103531521 in words is "one hundred three million, five hundred thirty-one thousand, five hundred twenty-one".