100523521 has 4 divisors (see below), whose sum is σ = 114884032. Its totient is φ = 86163012.

The previous prime is 100523503. The next prime is 100523539. The reversal of 100523521 is 125325001.

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 an interprime number because it is at equal distance from previous prime (100523503) and next prime (100523539).

It is a cyclic number.

It is not a de Polignac number, because 100523521 - 2⁹ = 100523009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100523221) 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, 7180245 + ... + 7180258.

It is an arithmetic number, because the mean of its divisors is an integer number (28721008).

Almost surely, 2^100523521 is an apocalyptic number.

It is an amenable number.

100523521 is a deficient number, since it is larger than the sum of its proper divisors (14360511).

100523521 is an equidigital number, since it uses as much as digits as its factorization.

100523521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14360510.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 100523521 is about 10026.1418801052. The cubic root of 100523521 is about 464.9674637118.

Adding to 100523521 its reverse (125325001), we get a palindrome (225848522).

The spelling of 100523521 in words is "one hundred million, five hundred twenty-three thousand, five hundred twenty-one".