256220244143 has 8 divisors (see below), whose sum is σ = 259963675776. Its totient is φ = 252480554200.

The previous prime is 256220244121. The next prime is 256220244193. The reversal of 256220244143 is 341442022652.

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 256220244143 - 2¹⁶ = 256220178607 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 (256220244113) 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, 797321 + ... + 1071522.

It is an arithmetic number, because the mean of its divisors is an integer number (32495459472).

Almost surely, 2^256220244143 is an apocalyptic number.

256220244143 is a deficient number, since it is larger than the sum of its proper divisors (3743431633).

256220244143 is a wasteful number, since it uses less digits than its factorization.

256220244143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870845.

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 256220244143 its reverse (341442022652), we get a palindrome (597662266795).

The spelling of 256220244143 in words is "two hundred fifty-six billion, two hundred twenty million, two hundred forty-four thousand, one hundred forty-three".