133401655 has 16 divisors (see below), whose sum is σ = 164656800. Its totient is φ = 103713280.

The previous prime is 133401607. The next prime is 133401661. The reversal of 133401655 is 556104331.

It is not a de Polignac number, because 133401655 - 2⁹ = 133401143 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23715 + ... + 28795.

It is an arithmetic number, because the mean of its divisors is an integer number (10291050).

Almost surely, 2^133401655 is an apocalyptic number.

133401655 is a deficient number, since it is larger than the sum of its proper divisors (31255145).

133401655 is an equidigital number, since it uses as much as digits as its factorization.

133401655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 133401655 is about 11549.9634198555. The cubic root of 133401655 is about 510.9601992584.

Adding to 133401655 its reverse (556104331), we get a palindrome (689505986).

The spelling of 133401655 in words is "one hundred thirty-three million, four hundred one thousand, six hundred fifty-five".