256920303 has 32 divisors (see below), whose sum is σ = 370180800. Its totient is φ = 157925376.

The previous prime is 256920263. The next prime is 256920317. The reversal of 256920303 is 303029652.

It is not a de Polignac number, because 256920303 - 2⁶ = 256920239 is a prime.

It is a super-2 number, since 2×256920303² = 132016084187223618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256920383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 627963 + ... + 628371.

It is an arithmetic number, because the mean of its divisors is an integer number (11568150).

Almost surely, 2^256920303 is an apocalyptic number.

256920303 is a deficient number, since it is larger than the sum of its proper divisors (113260497).

256920303 is a wasteful number, since it uses less digits than its factorization.

256920303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 256920303 is about 16028.7336680101. The cubic root of 256920303 is about 635.7203910151.

Adding to 256920303 its reverse (303029652), we get a palindrome (559949955).

The spelling of 256920303 in words is "two hundred fifty-six million, nine hundred twenty thousand, three hundred three".