200631945 has 16 divisors (see below), whose sum is σ = 329688000. Its totient is φ = 104111424.

The previous prime is 200631941. The next prime is 200631953. The reversal of 200631945 is 549136002.

It is not a de Polignac number, because 200631945 - 2² = 200631941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200631941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180195 + ... + 181304.

It is an arithmetic number, because the mean of its divisors is an integer number (20605500).

Almost surely, 2^200631945 is an apocalyptic number.

It is an amenable number.

200631945 is a deficient number, since it is larger than the sum of its proper divisors (129056055).

200631945 is a wasteful number, since it uses less digits than its factorization.

200631945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361544.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 200631945 is about 14164.4606321596. The cubic root of 200631945 is about 585.4188395091.

Adding to 200631945 its reverse (549136002), we get a palindrome (749767947).

The spelling of 200631945 in words is "two hundred million, six hundred thirty-one thousand, nine hundred forty-five".