145554433 has 4 divisors (see below), whose sum is σ = 146995668. Its totient is φ = 144113200.

The previous prime is 145554407. The next prime is 145554439. The reversal of 145554433 is 334455541.

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 141681409 + 3873024 = 11903^2 + 1968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145554433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145554439) 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, 720466 + ... + 720667.

It is an arithmetic number, because the mean of its divisors is an integer number (36748917).

Almost surely, 2^145554433 is an apocalyptic number.

It is an amenable number.

145554433 is a deficient number, since it is larger than the sum of its proper divisors (1441235).

145554433 is a wasteful number, since it uses less digits than its factorization.

145554433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441234.

The product of its digits is 72000, while the sum is 34.

The square root of 145554433 is about 12064.5941912689. The cubic root of 145554433 is about 526.0275361837.

The spelling of 145554433 in words is "one hundred forty-five million, five hundred fifty-four thousand, four hundred thirty-three".