133234431 has 32 divisors (see below), whose sum is σ = 198963456. Its totient is φ = 79279200.

The previous prime is 133234429. The next prime is 133234433. The reversal of 133234431 is 134432331.

It is an interprime number because it is at equal distance from previous prime (133234429) and next prime (133234433).

It is not a de Polignac number, because 133234431 - 2¹ = 133234429 is a prime.

It is a super-3 number, since 3×133234431³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133234433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243300 + ... + 243846.

It is an arithmetic number, because the mean of its divisors is an integer number (6217608).

Almost surely, 2^133234431 is an apocalyptic number.

133234431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133234431 is a deficient number, since it is larger than the sum of its proper divisors (65729025).

133234431 is an equidigital number, since it uses as much as digits as its factorization.

133234431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 622 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

The square root of 133234431 is about 11542.7219926671. The cubic root of 133234431 is about 510.7466073655.

Adding to 133234431 its reverse (134432331), we get a palindrome (267666762).

The spelling of 133234431 in words is "one hundred thirty-three million, two hundred thirty-four thousand, four hundred thirty-one".