256414651 has 4 divisors (see below), whose sum is σ = 258433792. Its totient is φ = 254395512.

The previous prime is 256414619. The next prime is 256414661. The reversal of 256414651 is 156414652.

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

It is a cyclic number.

It is not a de Polignac number, because 256414651 - 2⁵ = 256414619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256414661) 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, 1009380 + ... + 1009633.

It is an arithmetic number, because the mean of its divisors is an integer number (64608448).

Almost surely, 2^256414651 is an apocalyptic number.

256414651 is a deficient number, since it is larger than the sum of its proper divisors (2019141).

256414651 is a wasteful number, since it uses less digits than its factorization.

256414651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019140.

The product of its digits is 28800, while the sum is 34.

The square root of 256414651 is about 16012.9526009415. The cubic root of 256414651 is about 635.3030574408.

Subtracting from 256414651 its reverse (156414652), we obtain a palindrome (99999999).

The spelling of 256414651 in words is "two hundred fifty-six million, four hundred fourteen thousand, six hundred fifty-one".