100229 has 4 divisors (see below), whose sum is σ = 101676. Its totient is φ = 98784.

The previous prime is 100213. The next prime is 100237. The reversal of 100229 is 922001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922001 = 23 ⋅40087.

It can be written as a sum of positive squares in 2 ways, for example, as 84100 + 16129 = 290^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 100229 - 2⁴ = 100213 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100279) 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, 614 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (25419).

2¹⁰⁰²²⁹ is an apocalyptic number.

It is an amenable number.

100229 is a deficient number, since it is larger than the sum of its proper divisors (1447).

100229 is an equidigital number, since it uses as much as digits as its factorization.

100229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 100229 is about 316.5896397547. The cubic root of 100229 is about 46.4512921197.

The spelling of 100229 in words is "one hundred thousand, two hundred twenty-nine".