133306401 has 16 divisors (see below), whose sum is σ = 188443584. Its totient is φ = 83533824.

The previous prime is 133306373. The next prime is 133306403. The reversal of 133306401 is 104603331.

It is not a de Polignac number, because 133306401 - 2¹⁵ = 133273633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133306403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57670 + ... + 59936.

It is an arithmetic number, because the mean of its divisors is an integer number (11777724).

Almost surely, 2^133306401 is an apocalyptic number.

It is an amenable number.

133306401 is a deficient number, since it is larger than the sum of its proper divisors (55137183).

133306401 is a wasteful number, since it uses less digits than its factorization.

133306401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 133306401 is about 11545.8391206529. The cubic root of 133306401 is about 510.8385551110.

Adding to 133306401 its reverse (104603331), we get a palindrome (237909732).

The spelling of 133306401 in words is "one hundred thirty-three million, three hundred six thousand, four hundred one".