146531233 has 4 divisors (see below), whose sum is σ = 146648880. Its totient is φ = 146413588.

The previous prime is 146531191. The next prime is 146531237. The reversal of 146531233 is 332135641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332135641 = 823 ⋅403567.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146531233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146531237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56935 + ... + 59452.

It is an arithmetic number, because the mean of its divisors is an integer number (36662220).

Almost surely, 2^146531233 is an apocalyptic number.

It is an amenable number.

146531233 is a deficient number, since it is larger than the sum of its proper divisors (117647).

146531233 is a wasteful number, since it uses less digits than its factorization.

146531233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117646.

The product of its digits is 6480, while the sum is 28.

The square root of 146531233 is about 12105.0085914881. The cubic root of 146531233 is about 527.2016182733.

Adding to 146531233 its reverse (332135641), we get a palindrome (478666874).

The spelling of 146531233 in words is "one hundred forty-six million, five hundred thirty-one thousand, two hundred thirty-three".