145242233 has 4 divisors (see below), whose sum is σ = 145271028. Its totient is φ = 145213440.

The previous prime is 145242157. The next prime is 145242269. The reversal of 145242233 is 332242541.

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 56355049 + 88887184 = 7507^2 + 9428^2 .

It is a cyclic number.

It is not a de Polignac number, because 145242233 - 2²⁰ = 144193657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145242733) 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, 4616 + ... + 17657.

It is an arithmetic number, because the mean of its divisors is an integer number (36317757).

Almost surely, 2^145242233 is an apocalyptic number.

It is an amenable number.

145242233 is a deficient number, since it is larger than the sum of its proper divisors (28795).

145242233 is an equidigital number, since it uses as much as digits as its factorization.

145242233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28794.

The product of its digits is 5760, while the sum is 26.

The square root of 145242233 is about 12051.6485594295. The cubic root of 145242233 is about 525.6511744575.

Adding to 145242233 its reverse (332242541), we get a palindrome (477484774).

It can be divided in two parts, 1452 and 42233, that multiplied together give a palindrome (61322316).

The spelling of 145242233 in words is "one hundred forty-five million, two hundred forty-two thousand, two hundred thirty-three".