100433261 has 4 divisors (see below), whose sum is σ = 100542300. Its totient is φ = 100324224.

The previous prime is 100433243. The next prime is 100433269. The reversal of 100433261 is 162334001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162334001 = 4603 ⋅35267.

It can be written as a sum of positive squares in 2 ways, for example, as 2621161 + 97812100 = 1619^2 + 9890^2 .

It is a cyclic number.

It is not a de Polignac number, because 100433261 - 2¹⁸ = 100171117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100433269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53126 + ... + 54983.

It is an arithmetic number, because the mean of its divisors is an integer number (25135575).

Almost surely, 2^100433261 is an apocalyptic number.

It is an amenable number.

100433261 is a deficient number, since it is larger than the sum of its proper divisors (109039).

100433261 is an equidigital number, since it uses as much as digits as its factorization.

100433261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109038.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 100433261 is about 10021.6396363070. The cubic root of 100433261 is about 464.8282573844.

Adding to 100433261 its reverse (162334001), we get a palindrome (262767262).

The spelling of 100433261 in words is "one hundred million, four hundred thirty-three thousand, two hundred sixty-one".