40230257 has 2 divisors, whose sum is σ = 40230258. Its totient is φ = 40230256.

The previous prime is 40230247. The next prime is 40230259. The reversal of 40230257 is 75203204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36372961 + 3857296 = 6031^2 + 1964^2 .

It is a cyclic number.

It is not a de Polignac number, because 40230257 - 2²² = 36035953 is a prime.

Together with 40230259, 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 (40230259) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115128 + 20115129.

It is an arithmetic number, because the mean of its divisors is an integer number (20115129).

Almost surely, 2^40230257 is an apocalyptic number.

It is an amenable number.

40230257 is a deficient number, since it is larger than the sum of its proper divisors (1).

40230257 is an equidigital number, since it uses as much as digits as its factorization.

40230257 is an odious number, because the sum of its binary digits is odd.

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

The square root of 40230257 is about 6342.7326129989. The cubic root of 40230257 is about 342.6501573995.

The spelling of 40230257 in words is "forty million, two hundred thirty thousand, two hundred fifty-seven".