145223207 has 8 divisors (see below), whose sum is σ = 148571280. Its totient is φ = 141912000.

The previous prime is 145223203. The next prime is 145223257. The reversal of 145223207 is 702322541.

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

It is not a de Polignac number, because 145223207 - 2² = 145223203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145223203) 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, 1169 + ... + 17082.

It is an arithmetic number, because the mean of its divisors is an integer number (18571410).

Almost surely, 2^145223207 is an apocalyptic number.

145223207 is a deficient number, since it is larger than the sum of its proper divisors (3348073).

145223207 is a wasteful number, since it uses less digits than its factorization.

145223207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18433.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 145223207 is about 12050.8591809879. The cubic root of 145223207 is about 525.6282209042.

Adding to 145223207 its reverse (702322541), we get a palindrome (847545748).

The spelling of 145223207 in words is "one hundred forty-five million, two hundred twenty-three thousand, two hundred seven".