133908799431 has 32 divisors (see below), whose sum is σ = 205240780800. Its totient is φ = 76805578080.

The previous prime is 133908799429. The next prime is 133908799433. The reversal of 133908799431 is 134997809331.

It is an interprime number because it is at equal distance from previous prime (133908799429) and next prime (133908799433).

It is not a de Polignac number, because 133908799431 - 2¹ = 133908799429 is a prime.

It is a super-2 number, since 2×133908799431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133908799433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495880 + ... + 716738.

It is an arithmetic number, because the mean of its divisors is an integer number (6413774400).

Almost surely, 2^133908799431 is an apocalyptic number.

133908799431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133908799431 is a deficient number, since it is larger than the sum of its proper divisors (71331981369).

133908799431 is a wasteful number, since it uses less digits than its factorization.

133908799431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221859.

The product of its (nonzero) digits is 4408992, while the sum is 57.

It can be divided in two parts, 133908 and 799431, that added together give a palindrome (933339).

The spelling of 133908799431 in words is "one hundred thirty-three billion, nine hundred eight million, seven hundred ninety-nine thousand, four hundred thirty-one".