145332233 has 4 divisors (see below), whose sum is σ = 146771268. Its totient is φ = 143893200.

The previous prime is 145332227. The next prime is 145332241. The reversal of 145332233 is 332233541.

It is a happy number.

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 126945289 + 18386944 = 11267^2 + 4288^2 .

It is a cyclic number.

It is not a de Polignac number, because 145332233 - 2⁶ = 145332169 is a prime.

It is a super-2 number, since 2×145332233² = 42242915897532578, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145332223) 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, 719366 + ... + 719567.

It is an arithmetic number, because the mean of its divisors is an integer number (36692817).

Almost surely, 2^145332233 is an apocalyptic number.

It is an amenable number.

145332233 is a deficient number, since it is larger than the sum of its proper divisors (1439035).

145332233 is a wasteful number, since it uses less digits than its factorization.

145332233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439034.

The product of its digits is 6480, while the sum is 26.

The square root of 145332233 is about 12055.3819101678. The cubic root of 145332233 is about 525.7597260737.

Adding to 145332233 its reverse (332233541), we get a palindrome (477565774).

The spelling of 145332233 in words is "one hundred forty-five million, three hundred thirty-two thousand, two hundred thirty-three".