100553421 has 8 divisors (see below), whose sum is σ = 135686880. Its totient is φ = 66227792.

The previous prime is 100553417. The next prime is 100553423. The reversal of 100553421 is 124355001.

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 100553421 - 2² = 100553417 is a prime.

It is a super-2 number, since 2×100553421² = 20221980949606482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100553423) 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 7 ways as a sum of consecutive naturals, for example, 201666 + ... + 202163.

It is an arithmetic number, because the mean of its divisors is an integer number (16960860).

Almost surely, 2^100553421 is an apocalyptic number.

It is an amenable number.

100553421 is a deficient number, since it is larger than the sum of its proper divisors (35133459).

100553421 is an equidigital number, since it uses as much as digits as its factorization.

100553421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403915.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 100553421 is about 10027.6328712214. The cubic root of 100553421 is about 465.0135595537.

The spelling of 100553421 in words is "one hundred million, five hundred fifty-three thousand, four hundred twenty-one".