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256090201 = 263973727
BaseRepresentation
bin11110100001110…
…10000001011001
3122211212201201021
433100322001121
51011024341301
641224522441
76226505443
oct1720720131
9584781637
10256090201
111216133a4
1271920421
1341095783
1426023493
15177388a1
hexf43a059

256090201 has 4 divisors (see below), whose sum is σ = 257064192. Its totient is φ = 255116212.

The previous prime is 256090199. The next prime is 256090231. The reversal of 256090201 is 102090652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256090201 - 21 = 256090199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256090231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486601 + ... + 487126.

It is an arithmetic number, because the mean of its divisors is an integer number (64266048).

Almost surely, 2256090201 is an apocalyptic number.

It is an amenable number.

256090201 is a deficient number, since it is larger than the sum of its proper divisors (973991).

256090201 is an equidigital number, since it uses as much as digits as its factorization.

256090201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973990.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 256090201 is about 16002.8185329960. The cubic root of 256090201 is about 635.0349876355.

The spelling of 256090201 in words is "two hundred fifty-six million, ninety thousand, two hundred one".

Divisors: 1 263 973727 256090201