40203257 has 2 divisors, whose sum is σ = 40203258. Its totient is φ = 40203256.

The previous prime is 40203227. The next prime is 40203271. The reversal of 40203257 is 75230204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28987456 + 11215801 = 5384^2 + 3349^2 .

It is a cyclic number.

It is not a de Polignac number, because 40203257 - 2¹² = 40199161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40203227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101628 + 20101629.

It is an arithmetic number, because the mean of its divisors is an integer number (20101629).

Almost surely, 2^40203257 is an apocalyptic number.

It is an amenable number.

40203257 is a deficient number, since it is larger than the sum of its proper divisors (1).

40203257 is an equidigital number, since it uses as much as digits as its factorization.

40203257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 40203257 is about 6340.6038355980. The cubic root of 40203257 is about 342.5734852179.

The spelling of 40203257 in words is "forty million, two hundred three thousand, two hundred fifty-seven".