2250289981 has 2 divisors, whose sum is σ = 2250289982. Its totient is φ = 2250289980.

The previous prime is 2250289931. The next prime is 2250290039. The reversal of 2250289981 is 1899820522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2221613956 + 28676025 = 47134^2 + 5355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2250289981 is a prime.

It is a super-2 number, since 2×2250289981² = 10127609997177960722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2250289931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125144990 + 1125144991.

It is an arithmetic number, because the mean of its divisors is an integer number (1125144991).

Almost surely, 2^2250289981 is an apocalyptic number.

It is an amenable number.

2250289981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2250289981 is an equidigital number, since it uses as much as digits as its factorization.

2250289981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 2250289981 is about 47437.2214721731. The cubic root of 2250289981 is about 1310.4269884055.

The spelling of 2250289981 in words is "two billion, two hundred fifty million, two hundred eighty-nine thousand, nine hundred eighty-one".