256351442 has 8 divisors (see below), whose sum is σ = 392708736. Its totient is φ = 125448532.

The previous prime is 256351441. The next prime is 256351451. The reversal of 256351442 is 244153652.

256351442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 256351399 and 256351408.

It is not an unprimeable number, because it can be changed into a prime (256351441) 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, 1363478 + ... + 1363665.

It is an arithmetic number, because the mean of its divisors is an integer number (49088592).

Almost surely, 2^256351442 is an apocalyptic number.

256351442 is a deficient number, since it is larger than the sum of its proper divisors (136357294).

256351442 is a wasteful number, since it uses less digits than its factorization.

256351442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727192.

The product of its digits is 28800, while the sum is 32.

The square root of 256351442 is about 16010.9787958138. The cubic root of 256351442 is about 635.2508501131.

The spelling of 256351442 in words is "two hundred fifty-six million, three hundred fifty-one thousand, four hundred forty-two".