256503351 has 32 divisors (see below), whose sum is σ = 381124800. Its totient is φ = 152423424.

The previous prime is 256503349. The next prime is 256503367. The reversal of 256503351 is 153305652.

It is not a de Polignac number, because 256503351 - 2¹ = 256503349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256503311) 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, 214411 + ... + 215603.

It is an arithmetic number, because the mean of its divisors is an integer number (11910150).

Almost surely, 2^256503351 is an apocalyptic number.

256503351 is a deficient number, since it is larger than the sum of its proper divisors (124621449).

256503351 is a wasteful number, since it uses less digits than its factorization.

256503351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 256503351 is about 16015.7219943404. The cubic root of 256503351 is about 635.3763045355.

The spelling of 256503351 in words is "two hundred fifty-six million, five hundred three thousand, three hundred fifty-one".