256507175315203 has 4 divisors (see below), whose sum is σ = 256507286006520. Its totient is φ = 256507064623888.

The previous prime is 256507175315197. The next prime is 256507175315207. The reversal of 256507175315203 is 302513571705652.

It is a happy number.

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-256507175315203 is a prime.

It is a super-3 number, since 3×256507175315203³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256507175315207) 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, 51793693 + ... + 56529646.

It is an arithmetic number, because the mean of its divisors is an integer number (64126821501630).

Almost surely, 2^{256507175315203} is an apocalyptic number.

256507175315203 is a deficient number, since it is larger than the sum of its proper divisors (110691317).

256507175315203 is a wasteful number, since it uses less digits than its factorization.

256507175315203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110691316.

The product of its (nonzero) digits is 6615000, while the sum is 52.

The spelling of 256507175315203 in words is "two hundred fifty-six trillion, five hundred seven billion, one hundred seventy-five million, three hundred fifteen thousand, two hundred three".