249020281 has 2 divisors, whose sum is σ = 249020282. Its totient is φ = 249020280.

The previous prime is 249020263. The next prime is 249020293. The reversal of 249020281 is 182020942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249008400 + 11881 = 15780^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 249020281 - 2¹³ = 249012089 is a prime.

It is a super-2 number, since 2×249020281² = 124022200698637922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249020231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124510140 + 124510141.

It is an arithmetic number, because the mean of its divisors is an integer number (124510141).

Almost surely, 2^249020281 is an apocalyptic number.

It is an amenable number.

249020281 is a deficient number, since it is larger than the sum of its proper divisors (1).

249020281 is an equidigital number, since it uses as much as digits as its factorization.

249020281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 249020281 is about 15780.3764530508. The cubic root of 249020281 is about 629.1365352430.

The spelling of 249020281 in words is "two hundred forty-nine million, twenty thousand, two hundred eighty-one".