256025619 has 6 divisors (see below), whose sum is σ = 369814796. Its totient is φ = 170683740.

The previous prime is 256025617. The next prime is 256025647. The reversal of 256025619 is 916520652.

It is not a de Polignac number, because 256025619 - 2¹ = 256025617 is a prime.

It is a super-2 number, since 2×256025619² = 131098235168666322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256025611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14223637 + ... + 14223654.

Almost surely, 2^256025619 is an apocalyptic number.

256025619 is a deficient number, since it is larger than the sum of its proper divisors (113789177).

256025619 is a wasteful number, since it uses less digits than its factorization.

256025619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28447297 (or 28447294 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 256025619 is about 16000.8005737213. The cubic root of 256025619 is about 634.9816011368.

The spelling of 256025619 in words is "two hundred fifty-six million, twenty-five thousand, six hundred nineteen".