133403131 has 4 divisors (see below), whose sum is σ = 141250392. Its totient is φ = 125555872.

The previous prime is 133403129. The next prime is 133403143. The reversal of 133403131 is 131304331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133403131 - 2¹ = 133403129 is a prime.

It is a super-2 number, since 2×133403131² = 35592790721206322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133403099 and 133403108.

It is not an unprimeable number, because it can be changed into a prime (133406131) 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 3 ways as a sum of consecutive naturals, for example, 3923605 + ... + 3923638.

It is an arithmetic number, because the mean of its divisors is an integer number (35312598).

Almost surely, 2^133403131 is an apocalyptic number.

133403131 is a deficient number, since it is larger than the sum of its proper divisors (7847261).

133403131 is an equidigital number, since it uses as much as digits as its factorization.

133403131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7847260.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 133403131 is about 11550.0273159850. The cubic root of 133403131 is about 510.9620837289.

Adding to 133403131 its reverse (131304331), we get a palindrome (264707462).

It can be divided in two parts, 13340 and 3131, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 133403131 in words is "one hundred thirty-three million, four hundred three thousand, one hundred thirty-one".