100055521 has 4 divisors (see below), whose sum is σ = 100080832. Its totient is φ = 100030212.

The previous prime is 100055509. The next prime is 100055531. The reversal of 100055521 is 125550001.

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 100055521 - 2⁷ = 100055393 is a prime.

It is a super-2 number, since 2×100055521² = 20022214565162882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100055531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5301 + ... + 15106.

It is an arithmetic number, because the mean of its divisors is an integer number (25020208).

Almost surely, 2^100055521 is an apocalyptic number.

It is an amenable number.

100055521 is a deficient number, since it is larger than the sum of its proper divisors (25311).

100055521 is an equidigital number, since it uses as much as digits as its factorization.

100055521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25310.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 100055521 is about 10002.7756647843. The cubic root of 100055521 is about 464.2447693529.

It can be divided in two parts, 100055 and 521, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 100055521 in words is "one hundred million, fifty-five thousand, five hundred twenty-one".