133458231 has 4 divisors (see below), whose sum is σ = 177944312. Its totient is φ = 88972152.

The previous prime is 133458191. The next prime is 133458253. The reversal of 133458231 is 132854331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133458231 - 2⁷ = 133458103 is a prime.

It is a super-2 number, since 2×133458231² = 35622198843298722, 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 (133458431) 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 3 ways as a sum of consecutive naturals, for example, 22243036 + ... + 22243041.

It is an arithmetic number, because the mean of its divisors is an integer number (44486078).

Almost surely, 2^133458231 is an apocalyptic number.

133458231 is a deficient number, since it is larger than the sum of its proper divisors (44486081).

133458231 is an equidigital number, since it uses as much as digits as its factorization.

133458231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44486080.

The product of its digits is 8640, while the sum is 30.

The square root of 133458231 is about 11552.4123454801. The cubic root of 133458231 is about 511.0324222467.

The spelling of 133458231 in words is "one hundred thirty-three million, four hundred fifty-eight thousand, two hundred thirty-one".