133220401 has 8 divisors (see below), whose sum is σ = 137263784. Its totient is φ = 129237120.

The previous prime is 133220383. The next prime is 133220413. The reversal of 133220401 is 104022331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17098225 + 116122176 = 4135^2 + 10776^2 .

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 133220401 - 2⁵ = 133220369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133227401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10506 + ... + 19411.

It is an arithmetic number, because the mean of its divisors is an integer number (17157973).

Almost surely, 2^133220401 is an apocalyptic number.

It is an amenable number.

133220401 is a deficient number, since it is larger than the sum of its proper divisors (4043383).

133220401 is an equidigital number, since it uses as much as digits as its factorization.

133220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30051.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 133220401 is about 11542.1142344026. The cubic root of 133220401 is about 510.7286790007.

Adding to 133220401 its reverse (104022331), we get a palindrome (237242732).

The spelling of 133220401 in words is "one hundred thirty-three million, two hundred twenty thousand, four hundred one".