145422205 has 8 divisors (see below), whose sum is σ = 176897592. Its totient is φ = 114743808.

The previous prime is 145422187. The next prime is 145422229. The reversal of 145422205 is 502224541.

It can be written as a sum of positive squares in 4 ways, for example, as 63664441 + 81757764 = 7979^2 + 9042^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145422205 - 2⁹ = 145421693 is a prime.

It is a super-2 number, since 2×145422205² = 42295235414124050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145422205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198844 + ... + 199573.

It is an arithmetic number, because the mean of its divisors is an integer number (22112199).

Almost surely, 2^145422205 is an apocalyptic number.

It is an amenable number.

145422205 is a deficient number, since it is larger than the sum of its proper divisors (31475387).

145422205 is an equidigital number, since it uses as much as digits as its factorization.

145422205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398495.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 145422205 is about 12059.1129441597. The cubic root of 145422205 is about 525.8681991332.

Adding to 145422205 its reverse (502224541), we get a palindrome (647646746).

The spelling of 145422205 in words is "one hundred forty-five million, four hundred twenty-two thousand, two hundred five".