145322201 has 4 divisors (see below), whose sum is σ = 145444404. Its totient is φ = 145200000.

The previous prime is 145322173. The next prime is 145322267. The reversal of 145322201 is 102223541.

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 26512201 + 118810000 = 5149^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 145322201 - 2²⁶ = 78213337 is a prime.

It is a super-2 number, since 2×145322201² = 42237084206968802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145322101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59300 + ... + 61701.

It is an arithmetic number, because the mean of its divisors is an integer number (36361101).

Almost surely, 2^145322201 is an apocalyptic number.

It is an amenable number.

145322201 is a deficient number, since it is larger than the sum of its proper divisors (122203).

145322201 is a wasteful number, since it uses less digits than its factorization.

145322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122202.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 145322201 is about 12054.9658232614. The cubic root of 145322201 is about 525.7476284065.

Adding to 145322201 its reverse (102223541), we get a palindrome (247545742).

The spelling of 145322201 in words is "one hundred forty-five million, three hundred twenty-two thousand, two hundred one".