257216003 has 4 divisors (see below), whose sum is σ = 280599288. Its totient is φ = 233832720.

The previous prime is 257215999. The next prime is 257216017. The reversal of 257216003 is 300612752.

257216003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 257216003 - 2² = 257215999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257216033) 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, 11691626 + ... + 11691647.

It is an arithmetic number, because the mean of its divisors is an integer number (70149822).

Almost surely, 2^257216003 is an apocalyptic number.

257216003 is a deficient number, since it is larger than the sum of its proper divisors (23383285).

257216003 is a wasteful number, since it uses less digits than its factorization.

257216003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23383284.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 257216003 is about 16037.9550753829. The cubic root of 257216003 is about 635.9641896362.

Adding to 257216003 its reverse (300612752), we get a palindrome (557828755).

The spelling of 257216003 in words is "two hundred fifty-seven million, two hundred sixteen thousand, three".