40517251 has 2 divisors, whose sum is σ = 40517252. Its totient is φ = 40517250.

The previous prime is 40517233. The next prime is 40517287. The reversal of 40517251 is 15271504.

40517251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40517251 - 2⁵ = 40517219 is a prime.

It is not a weakly prime, because it can be changed into another prime (40517221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20258625 + 20258626.

It is an arithmetic number, because the mean of its divisors is an integer number (20258626).

Almost surely, 2^40517251 is an apocalyptic number.

40517251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40517251 is an equidigital number, since it uses as much as digits as its factorization.

40517251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 40517251 is about 6365.3162529445. The cubic root of 40517251 is about 343.4630250185.

Adding to 40517251 its reverse (15271504), we get a palindrome (55788755).

The spelling of 40517251 in words is "forty million, five hundred seventeen thousand, two hundred fifty-one".