100825221 has 8 divisors (see below), whose sum is σ = 153638464. Its totient is φ = 57614400.

The previous prime is 100825217. The next prime is 100825223. The reversal of 100825221 is 122528001.

It is a happy number.

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

It is not a de Polignac number, because 100825221 - 2² = 100825217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 4801201 = 100825221 / (1 + 0 + 0 + 8 + 2 + 5 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100825223) 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, 2400580 + ... + 2400621.

It is an arithmetic number, because the mean of its divisors is an integer number (19204808).

Almost surely, 2^100825221 is an apocalyptic number.

It is an amenable number.

100825221 is a deficient number, since it is larger than the sum of its proper divisors (52813243).

100825221 is an equidigital number, since it uses as much as digits as its factorization.

100825221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4801211.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 100825221 is about 10041.1762757159. The cubic root of 100825221 is about 465.4321661518.

The spelling of 100825221 in words is "one hundred million, eight hundred twenty-five thousand, two hundred twenty-one".