40303253 has 2 divisors, whose sum is σ = 40303254. Its totient is φ = 40303252.

The previous prime is 40303231. The next prime is 40303283. The reversal of 40303253 is 35230304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 4566769 = 5978^2 + 2137^2 .

It is a cyclic number.

It is not a de Polignac number, because 40303253 - 2¹² = 40299157 is a prime.

It is a super-3 number, since 3×40303253³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40303213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151626 + 20151627.

It is an arithmetic number, because the mean of its divisors is an integer number (20151627).

Almost surely, 2^40303253 is an apocalyptic number.

It is an amenable number.

40303253 is a deficient number, since it is larger than the sum of its proper divisors (1).

40303253 is an equidigital number, since it uses as much as digits as its factorization.

40303253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 40303253 is about 6348.4843072973. The cubic root of 40303253 is about 342.8572733052.

Adding to 40303253 its reverse (35230304), we get a palindrome (75533557).

The spelling of 40303253 in words is "forty million, three hundred three thousand, two hundred fifty-three".