2254787581 has 2 divisors, whose sum is σ = 2254787582. Its totient is φ = 2254787580.

The previous prime is 2254787531. The next prime is 2254787593. The reversal of 2254787581 is 1857874522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1245454681 + 1009332900 = 35291^2 + 31770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2254787581 - 2⁷ = 2254787453 is a prime.

It is a super-2 number, since 2×2254787581² = 10168134070863663122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2254787531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127393790 + 1127393791.

It is an arithmetic number, because the mean of its divisors is an integer number (1127393791).

Almost surely, 2^2254787581 is an apocalyptic number.

It is an amenable number.

2254787581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2254787581 is an equidigital number, since it uses as much as digits as its factorization.

2254787581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254400, while the sum is 49.

The square root of 2254787581 is about 47484.6036205421. The cubic root of 2254787581 is about 1311.2994469545.

The spelling of 2254787581 in words is "two billion, two hundred fifty-four million, seven hundred eighty-seven thousand, five hundred eighty-one".