133633331731 has 4 divisors (see below), whose sum is σ = 140666665000. Its totient is φ = 126599998464.

The previous prime is 133633331729. The next prime is 133633331737. The reversal of 133633331731 is 137133336331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137133336331 = 17 ⋅8066666843.

It is a cyclic number.

It is not a de Polignac number, because 133633331731 - 2¹ = 133633331729 is a prime.

It is a super-2 number, since 2×133633331731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133633331737) 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, 3516666606 + ... + 3516666643.

It is an arithmetic number, because the mean of its divisors is an integer number (35166666250).

Almost surely, 2^133633331731 is an apocalyptic number.

133633331731 is a deficient number, since it is larger than the sum of its proper divisors (7033333269).

133633331731 is an equidigital number, since it uses as much as digits as its factorization.

133633331731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033333268.

The product of its digits is 91854, while the sum is 37.

The spelling of 133633331731 in words is "one hundred thirty-three billion, six hundred thirty-three million, three hundred thirty-one thousand, seven hundred thirty-one".