40305253 has 2 divisors, whose sum is σ = 40305254. Its totient is φ = 40305252.

The previous prime is 40305241. The next prime is 40305311. The reversal of 40305253 is 35250304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39917124 + 388129 = 6318^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 40305253 - 2⁹ = 40304741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40305203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152626 + 20152627.

It is an arithmetic number, because the mean of its divisors is an integer number (20152627).

Almost surely, 2^40305253 is an apocalyptic number.

It is an amenable number.

40305253 is a deficient number, since it is larger than the sum of its proper divisors (1).

40305253 is an equidigital number, since it uses as much as digits as its factorization.

40305253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 40305253 is about 6348.6418232564. The cubic root of 40305253 is about 342.8629445033.

Adding to 40305253 its reverse (35250304), we get a palindrome (75555557).

The spelling of 40305253 in words is "forty million, three hundred five thousand, two hundred fifty-three".