200431657 has 4 divisors (see below), whose sum is σ = 205320276. Its totient is φ = 195543040.

The previous prime is 200431633. The next prime is 200431663. The reversal of 200431657 is 756134002.

200431657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5103081 + 195328576 = 2259^2 + 13976^2 .

It is a cyclic number.

It is not a de Polignac number, because 200431657 - 2⁷ = 200431529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200431607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2444248 + ... + 2444329.

It is an arithmetic number, because the mean of its divisors is an integer number (51330069).

Almost surely, 2^200431657 is an apocalyptic number.

It is an amenable number.

200431657 is a deficient number, since it is larger than the sum of its proper divisors (4888619).

200431657 is an equidigital number, since it uses as much as digits as its factorization.

200431657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888618.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 200431657 is about 14157.3887775960. The cubic root of 200431657 is about 585.2239695656.

Adding to 200431657 its reverse (756134002), we get a palindrome (956565659).

The spelling of 200431657 in words is "two hundred million, four hundred thirty-one thousand, six hundred fifty-seven".