133154231 has 16 divisors (see below), whose sum is σ = 156747264. Its totient is φ = 110722464.

The previous prime is 133154227. The next prime is 133154233. The reversal of 133154231 is 132451331.

It is a cyclic number.

It is not a de Polignac number, because 133154231 - 2² = 133154227 is a prime.

It is a super-2 number, since 2×133154231² = 35460098466402722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133154197 and 133154206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133154233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134966 + ... + 135948.

It is an arithmetic number, because the mean of its divisors is an integer number (9796704).

Almost surely, 2^133154231 is an apocalyptic number.

133154231 is a deficient number, since it is larger than the sum of its proper divisors (23593033).

133154231 is an equidigital number, since it uses as much as digits as its factorization.

133154231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550.

The product of its digits is 1080, while the sum is 23.

The square root of 133154231 is about 11539.2474191344. The cubic root of 133154231 is about 510.6441060844.

The spelling of 133154231 in words is "one hundred thirty-three million, one hundred fifty-four thousand, two hundred thirty-one".