200123445 has 24 divisors (see below), whose sum is σ = 330883488. Its totient is φ = 103282080.

The previous prime is 200123431. The next prime is 200123449. The reversal of 200123445 is 544321002.

It is not a de Polignac number, because 200123445 - 2⁶ = 200123381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200123449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7474 + ... + 21356.

It is an arithmetic number, because the mean of its divisors is an integer number (13786812).

Almost surely, 2^200123445 is an apocalyptic number.

It is an amenable number.

200123445 is a deficient number, since it is larger than the sum of its proper divisors (130760043).

200123445 is a wasteful number, since it uses less digits than its factorization.

200123445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13953 (or 13922 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 200123445 is about 14146.4993903085. The cubic root of 200123445 is about 584.9238413531.

Adding to 200123445 its reverse (544321002), we get a palindrome (744444447).

The spelling of 200123445 in words is "two hundred million, one hundred twenty-three thousand, four hundred forty-five".