256090193 has 8 divisors (see below), whose sum is σ = 272124360. Its totient is φ = 240163840.

The previous prime is 256090187. The next prime is 256090199. The reversal of 256090193 is 391090652.

It is an interprime number because it is at equal distance from previous prime (256090187) and next prime (256090199).

It can be written as a sum of positive squares in 4 ways, for example, as 20866624 + 235223569 = 4568^2 + 15337^2 .

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 256090193 - 2⁸ = 256089937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256090199) 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, 22028 + ... + 31581.

It is an arithmetic number, because the mean of its divisors is an integer number (34015545).

Almost surely, 2^256090193 is an apocalyptic number.

It is an amenable number.

256090193 is a deficient number, since it is larger than the sum of its proper divisors (16034167).

256090193 is a wasteful number, since it uses less digits than its factorization.

256090193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53907.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 256090193 is about 16002.8182830400. The cubic root of 256090193 is about 635.0349810229.

The spelling of 256090193 in words is "two hundred fifty-six million, ninety thousand, one hundred ninety-three".