201228857 has 2 divisors, whose sum is σ = 201228858. Its totient is φ = 201228856.

The previous prime is 201228827. The next prime is 201228869. The reversal of 201228857 is 758822102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200618896 + 609961 = 14164^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 201228857 - 2⁶ = 201228793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201228827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100614428 + 100614429.

It is an arithmetic number, because the mean of its divisors is an integer number (100614429).

Almost surely, 2^201228857 is an apocalyptic number.

It is an amenable number.

201228857 is a deficient number, since it is larger than the sum of its proper divisors (1).

201228857 is an equidigital number, since it uses as much as digits as its factorization.

201228857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 201228857 is about 14185.5157467045. The cubic root of 201228857 is about 585.9988361325.

The spelling of 201228857 in words is "two hundred one million, two hundred twenty-eight thousand, eight hundred fifty-seven".