133140231 has 12 divisors (see below), whose sum is σ = 219787152. Its totient is φ = 76080096.

The previous prime is 133140221. The next prime is 133140233. The reversal of 133140231 is 132041331.

It is not a de Polignac number, because 133140231 - 2⁵ = 133140199 is a prime.

It is a super-2 number, since 2×133140231² = 35452642221466722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133140233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056606 + ... + 1056731.

It is an arithmetic number, because the mean of its divisors is an integer number (18315596).

Almost surely, 2^133140231 is an apocalyptic number.

133140231 is a deficient number, since it is larger than the sum of its proper divisors (86646921).

133140231 is a wasteful number, since it uses less digits than its factorization.

133140231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113350 (or 2113347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133140231 is about 11538.6407778386. The cubic root of 133140231 is about 510.6262088735.

Adding to 133140231 its reverse (132041331), we get a palindrome (265181562).

The spelling of 133140231 in words is "one hundred thirty-three million, one hundred forty thousand, two hundred thirty-one".