145322447 has 2 divisors, whose sum is σ = 145322448. Its totient is φ = 145322446.

The previous prime is 145322383. The next prime is 145322453. The reversal of 145322447 is 744223541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145322447 - 2⁶ = 145322383 is a prime.

It is a super-2 number, since 2×145322447² = 42237227204135618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145322467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72661223 + 72661224.

It is an arithmetic number, because the mean of its divisors is an integer number (72661224).

Almost surely, 2^145322447 is an apocalyptic number.

145322447 is a deficient number, since it is larger than the sum of its proper divisors (1).

145322447 is an equidigital number, since it uses as much as digits as its factorization.

145322447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 145322447 is about 12054.9760265212. The cubic root of 145322447 is about 525.7479250665.

Adding to 145322447 its reverse (744223541), we get a palindrome (889545988).

The spelling of 145322447 in words is "one hundred forty-five million, three hundred twenty-two thousand, four hundred forty-seven".