256203001 has 2 divisors, whose sum is σ = 256203002. Its totient is φ = 256203000.

The previous prime is 256202983. The next prime is 256203029. The reversal of 256203001 is 100302652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182655225 + 73547776 = 13515^2 + 8576^2 .

It is a cyclic number.

It is not a de Polignac number, because 256203001 - 2⁹ = 256202489 is a prime.

It is a super-3 number, since 3×256203001³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256203001.

It is not a weakly prime, because it can be changed into another prime (256203041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128101500 + 128101501.

It is an arithmetic number, because the mean of its divisors is an integer number (128101501).

Almost surely, 2^256203001 is an apocalyptic number.

It is an amenable number.

256203001 is a deficient number, since it is larger than the sum of its proper divisors (1).

256203001 is an equidigital number, since it uses as much as digits as its factorization.

256203001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 256203001 is about 16006.3425241371. The cubic root of 256203001 is about 635.1282118610.

Adding to 256203001 its reverse (100302652), we get a palindrome (356505653).

It can be divided in two parts, 25 and 6203001, that added together give a palindrome (6203026).

The spelling of 256203001 in words is "two hundred fifty-six million, two hundred three thousand, one".