145522273 has 8 divisors (see below), whose sum is σ = 164964800. Its totient is φ = 127258128.

The previous prime is 145522231. The next prime is 145522283. The reversal of 145522273 is 372225541.

145522273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145522273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145522283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294333 + ... + 294826.

It is an arithmetic number, because the mean of its divisors is an integer number (20620600).

Almost surely, 2^145522273 is an apocalyptic number.

145522273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145522273 is a deficient number, since it is larger than the sum of its proper divisors (19442527).

145522273 is a wasteful number, since it uses less digits than its factorization.

145522273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589191.

The product of its digits is 16800, while the sum is 31.

The square root of 145522273 is about 12063.2612920387. The cubic root of 145522273 is about 525.9887917055.

The spelling of 145522273 in words is "one hundred forty-five million, five hundred twenty-two thousand, two hundred seventy-three".