256512023 has 8 divisors (see below), whose sum is σ = 259492896. Its totient is φ = 253540000.

The previous prime is 256512013. The next prime is 256512029. The reversal of 256512023 is 320215652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256512023 - 2⁴ = 256512007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256511983 and 256512001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256512029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68990 + ... + 72612.

It is an arithmetic number, because the mean of its divisors is an integer number (32436612).

Almost surely, 2^256512023 is an apocalyptic number.

256512023 is a deficient number, since it is larger than the sum of its proper divisors (2980873).

256512023 is a wasteful number, since it uses less digits than its factorization.

256512023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 256512023 is about 16015.9927260223. The cubic root of 256512023 is about 635.3834648334.

Adding to 256512023 its reverse (320215652), we get a palindrome (576727675).

The spelling of 256512023 in words is "two hundred fifty-six million, five hundred twelve thousand, twenty-three".