201009257 has 2 divisors, whose sum is σ = 201009258. Its totient is φ = 201009256.

The previous prime is 201009253. The next prime is 201009269. The reversal of 201009257 is 752900102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186841561 + 14167696 = 13669^2 + 3764^2 .

It is a cyclic number.

It is not a de Polignac number, because 201009257 - 2² = 201009253 is a prime.

It is not a weakly prime, because it can be changed into another prime (201009253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100504628 + 100504629.

It is an arithmetic number, because the mean of its divisors is an integer number (100504629).

Almost surely, 2^201009257 is an apocalyptic number.

It is an amenable number.

201009257 is a deficient number, since it is larger than the sum of its proper divisors (1).

201009257 is an equidigital number, since it uses as much as digits as its factorization.

201009257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 201009257 is about 14177.7733442173. The cubic root of 201009257 is about 585.7855927207.

Adding to 201009257 its reverse (752900102), we get a palindrome (953909359).

The spelling of 201009257 in words is "two hundred one million, nine thousand, two hundred fifty-seven".