146555231 has 4 divisors (see below), whose sum is σ = 146722464. Its totient is φ = 146388000.

The previous prime is 146555219. The next prime is 146555239. The reversal of 146555231 is 132555641.

146555231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 146555231 - 2¹⁰ = 146554207 is a prime.

It is a super-3 number, since 3×146555231³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146555239) 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, 82295 + ... + 84056.

It is an arithmetic number, because the mean of its divisors is an integer number (36680616).

Almost surely, 2^146555231 is an apocalyptic number.

146555231 is a deficient number, since it is larger than the sum of its proper divisors (167233).

146555231 is an equidigital number, since it uses as much as digits as its factorization.

146555231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167232.

The product of its digits is 18000, while the sum is 32.

The square root of 146555231 is about 12105.9997934908. Note that the first 3 decimals coincide. The cubic root of 146555231 is about 527.2303973342.

The spelling of 146555231 in words is "one hundred forty-six million, five hundred fifty-five thousand, two hundred thirty-one".