133012231 has 8 divisors (see below), whose sum is σ = 146853504. Its totient is φ = 119462520.

The previous prime is 133012223. The next prime is 133012237. The reversal of 133012231 is 132210331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133012231 - 2³ = 133012223 is a prime.

It is a super-2 number, since 2×133012231² = 35384507191194722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133012237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71931 + ... + 73756.

It is an arithmetic number, because the mean of its divisors is an integer number (18356688).

Almost surely, 2^133012231 is an apocalyptic number.

133012231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133012231 is a deficient number, since it is larger than the sum of its proper divisors (13841273).

133012231 is a wasteful number, since it uses less digits than its factorization.

133012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145781.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 133012231 is about 11533.0928635817. The cubic root of 133012231 is about 510.4625190280.

Adding to 133012231 its reverse (132210331), we get a palindrome (265222562).

The spelling of 133012231 in words is "one hundred thirty-three million, twelve thousand, two hundred thirty-one".