100415221 has 2 divisors, whose sum is σ = 100415222. Its totient is φ = 100415220.

The previous prime is 100415179. The next prime is 100415233. The reversal of 100415221 is 122514001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96314596 + 4100625 = 9814^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 100415221 - 2⁷ = 100415093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100415195 and 100415204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100415321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50207610 + 50207611.

It is an arithmetic number, because the mean of its divisors is an integer number (50207611).

Almost surely, 2^100415221 is an apocalyptic number.

It is an amenable number.

100415221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100415221 is an equidigital number, since it uses as much as digits as its factorization.

100415221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 100415221 is about 10020.7395435666. The cubic root of 100415221 is about 464.8004246266.

Adding to 100415221 its reverse (122514001), we get a palindrome (222929222).

The spelling of 100415221 in words is "one hundred million, four hundred fifteen thousand, two hundred twenty-one".