133413555 has 32 divisors (see below), whose sum is σ = 233388288. Its totient is φ = 64540800.

The previous prime is 133413551. The next prime is 133413607. The reversal of 133413555 is 555314331.

It is not a de Polignac number, because 133413555 - 2² = 133413551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133413551) 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 31 ways as a sum of consecutive naturals, for example, 133317 + ... + 134313.

It is an arithmetic number, because the mean of its divisors is an integer number (7293384).

Almost surely, 2^133413555 is an apocalyptic number.

133413555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133413555 is a deficient number, since it is larger than the sum of its proper divisors (99974733).

133413555 is a wasteful number, since it uses less digits than its factorization.

133413555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827.

The product of its digits is 13500, while the sum is 30.

The square root of 133413555 is about 11550.4785615142. The cubic root of 133413555 is about 510.9753920873.

Adding to 133413555 its reverse (555314331), we get a palindrome (688727886).

The spelling of 133413555 in words is "one hundred thirty-three million, four hundred thirteen thousand, five hundred fifty-five".