145559233 has 4 divisors (see below), whose sum is σ = 147194820. Its totient is φ = 143923648.

The previous prime is 145559231. The next prime is 145559243. The reversal of 145559233 is 332955541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29953729 + 115605504 = 5473^2 + 10752^2 .

It is a cyclic number.

It is not a de Polignac number, because 145559233 - 2¹ = 145559231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145559192 and 145559201.

It is not an unprimeable number, because it can be changed into a prime (145559231) 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, 817660 + ... + 817837.

It is an arithmetic number, because the mean of its divisors is an integer number (36798705).

Almost surely, 2^145559233 is an apocalyptic number.

It is an amenable number.

145559233 is a deficient number, since it is larger than the sum of its proper divisors (1635587).

145559233 is an equidigital number, since it uses as much as digits as its factorization.

145559233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635586.

The product of its digits is 81000, while the sum is 37.

The square root of 145559233 is about 12064.7931188230. The cubic root of 145559233 is about 526.0333184521.

The spelling of 145559233 in words is "one hundred forty-five million, five hundred fifty-nine thousand, two hundred thirty-three".