256202237 has 2 divisors, whose sum is σ = 256202238. Its totient is φ = 256202236.

The previous prime is 256202231. The next prime is 256202263. The reversal of 256202237 is 732202652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256192036 + 10201 = 16006^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 256202237 - 2¹⁸ = 255940093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256202231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128101118 + 128101119.

It is an arithmetic number, because the mean of its divisors is an integer number (128101119).

Almost surely, 2^256202237 is an apocalyptic number.

It is an amenable number.

256202237 is a deficient number, since it is larger than the sum of its proper divisors (1).

256202237 is an equidigital number, since it uses as much as digits as its factorization.

256202237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 256202237 is about 16006.3186585798. The cubic root of 256202237 is about 635.1275805407.

Adding to 256202237 its reverse (732202652), we get a palindrome (988404889).

The spelling of 256202237 in words is "two hundred fifty-six million, two hundred two thousand, two hundred thirty-seven".