133061231 has 2 divisors, whose sum is σ = 133061232. Its totient is φ = 133061230.

The previous prime is 133061189. The next prime is 133061249. The reversal of 133061231 is 132160331.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (132160331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133061231 - 2⁶ = 133061167 is a prime.

It is a super-2 number, since 2×133061231² = 35410582390470722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133061281) 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 as a sum of consecutive naturals, namely, 66530615 + 66530616.

It is an arithmetic number, because the mean of its divisors is an integer number (66530616).

Almost surely, 2^133061231 is an apocalyptic number.

133061231 is a deficient number, since it is larger than the sum of its proper divisors (1).

133061231 is an equidigital number, since it uses as much as digits as its factorization.

133061231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 133061231 is about 11535.2169897233. The cubic root of 133061231 is about 510.5251939475.

The spelling of 133061231 in words is "one hundred thirty-three million, sixty-one thousand, two hundred thirty-one".