256751423 has 4 divisors (see below), whose sum is σ = 256842360. Its totient is φ = 256660488.

The previous prime is 256751401. The next prime is 256751447. The reversal of 256751423 is 324157652.

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 256751423 - 2⁶ = 256751359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256751923) 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, 41093 + ... + 46926.

It is an arithmetic number, because the mean of its divisors is an integer number (64210590).

Almost surely, 2^256751423 is an apocalyptic number.

256751423 is a deficient number, since it is larger than the sum of its proper divisors (90937).

256751423 is an equidigital number, since it uses as much as digits as its factorization.

256751423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90936.

The product of its digits is 50400, while the sum is 35.

The square root of 256751423 is about 16023.4647626536. The cubic root of 256751423 is about 635.5810689627.

The spelling of 256751423 in words is "two hundred fifty-six million, seven hundred fifty-one thousand, four hundred twenty-three".