257040011 has 4 divisors (see below), whose sum is σ = 257193000. Its totient is φ = 256887024.

The previous prime is 257039971. The next prime is 257040013. The reversal of 257040011 is 110040752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257040011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257040013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73946 + ... + 77343.

It is an arithmetic number, because the mean of its divisors is an integer number (64298250).

Almost surely, 2^257040011 is an apocalyptic number.

257040011 is a deficient number, since it is larger than the sum of its proper divisors (152989).

257040011 is a wasteful number, since it uses less digits than its factorization.

257040011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152988.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 257040011 is about 16032.4674021187. The cubic root of 257040011 is about 635.8191103448.

Adding to 257040011 its reverse (110040752), we get a palindrome (367080763).

The spelling of 257040011 in words is "two hundred fifty-seven million, forty thousand, eleven".