256342240523 has 8 divisors (see below), whose sum is σ = 264621520896. Its totient is φ = 248063596200.

The previous prime is 256342240501. The next prime is 256342240537. The reversal of 256342240523 is 325042243652.

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 256342240523 - 2⁸ = 256342240267 is a prime.

It is a super-2 number, since 2×256342240523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256342240223) 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, 740990 + ... + 1030412.

It is an arithmetic number, because the mean of its divisors is an integer number (33077690112).

Almost surely, 2^256342240523 is an apocalyptic number.

256342240523 is a deficient number, since it is larger than the sum of its proper divisors (8279280373).

256342240523 is a wasteful number, since it uses less digits than its factorization.

256342240523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318025.

The product of its (nonzero) digits is 345600, while the sum is 38.

The spelling of 256342240523 in words is "two hundred fifty-six billion, three hundred forty-two million, two hundred forty thousand, five hundred twenty-three".