133402331 has 16 divisors (see below), whose sum is σ = 140743680. Its totient is φ = 126286560.

The previous prime is 133402327. The next prime is 133402333. The reversal of 133402331 is 133204331.

It is not a de Polignac number, because 133402331 - 2² = 133402327 is a prime.

It is a super-3 number, since 3×133402331³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133402333) 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 15 ways as a sum of consecutive naturals, for example, 357461 + ... + 357833.

It is an arithmetic number, because the mean of its divisors is an integer number (8796480).

Almost surely, 2^133402331 is an apocalyptic number.

133402331 is a deficient number, since it is larger than the sum of its proper divisors (7341349).

133402331 is a wasteful number, since it uses less digits than its factorization.

133402331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 133402331 is about 11549.9926839804. The cubic root of 133402331 is about 510.9610623374.

Adding to 133402331 its reverse (133204331), we get a palindrome (266606662).

The spelling of 133402331 in words is "one hundred thirty-three million, four hundred two thousand, three hundred thirty-one".