256463345 has 4 divisors (see below), whose sum is σ = 307756020. Its totient is φ = 205170672.

The previous prime is 256463303. The next prime is 256463353. The reversal of 256463345 is 543364652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60715264 + 195748081 = 7792^2 + 13991^2 .

It is a cyclic number.

It is not a de Polignac number, because 256463345 - 2¹⁸ = 256201201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256463299 and 256463308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25646330 + ... + 25646339.

It is an arithmetic number, because the mean of its divisors is an integer number (76939005).

Almost surely, 2^256463345 is an apocalyptic number.

It is an amenable number.

256463345 is a deficient number, since it is larger than the sum of its proper divisors (51292675).

256463345 is an equidigital number, since it uses as much as digits as its factorization.

256463345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51292674.

The product of its digits is 259200, while the sum is 38.

The square root of 256463345 is about 16014.4729853967. The cubic root of 256463345 is about 635.3432702873.

The spelling of 256463345 in words is "two hundred fifty-six million, four hundred sixty-three thousand, three hundred forty-five".