250065581 has 2 divisors, whose sum is σ = 250065582. Its totient is φ = 250065580.

The previous prime is 250065577. The next prime is 250065649. The reversal of 250065581 is 185560052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204232681 + 45832900 = 14291^2 + 6770^2 .

It is a cyclic number.

It is not a de Polignac number, because 250065581 - 2² = 250065577 is a prime.

It is a super-2 number, since 2×250065581² = 125065589601735122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250065281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125032790 + 125032791.

It is an arithmetic number, because the mean of its divisors is an integer number (125032791).

Almost surely, 2^250065581 is an apocalyptic number.

It is an amenable number.

250065581 is a deficient number, since it is larger than the sum of its proper divisors (1).

250065581 is an equidigital number, since it uses as much as digits as its factorization.

250065581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 250065581 is about 15813.4620181667. The cubic root of 250065581 is about 630.0156047197.

The spelling of 250065581 in words is "two hundred fifty million, sixty-five thousand, five hundred eighty-one".