40250291 has 2 divisors, whose sum is σ = 40250292. Its totient is φ = 40250290.

The previous prime is 40250281. The next prime is 40250293. The reversal of 40250291 is 19205204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40250291 is a prime.

Together with 40250293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40250293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20125145 + 20125146.

It is an arithmetic number, because the mean of its divisors is an integer number (20125146).

Almost surely, 2^40250291 is an apocalyptic number.

40250291 is a deficient number, since it is larger than the sum of its proper divisors (1).

40250291 is an equidigital number, since it uses as much as digits as its factorization.

40250291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40250291 is about 6344.3117041961. The cubic root of 40250291 is about 342.7070259903.

Adding to 40250291 its reverse (19205204), we get a palindrome (59455495).

The spelling of 40250291 in words is "forty million, two hundred fifty thousand, two hundred ninety-one".