2250777581 has 4 divisors (see below), whose sum is σ = 2423914332. Its totient is φ = 2077640832.

The previous prime is 2250777569. The next prime is 2250777587. The reversal of 2250777581 is 1857770522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103938025 + 2146839556 = 10195^2 + 46334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2250777581 - 2¹⁴ = 2250761197 is a prime.

It is a super-2 number, since 2×2250777581² = 10131999438264423122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2250777587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86568356 + ... + 86568381.

It is an arithmetic number, because the mean of its divisors is an integer number (605978583).

Almost surely, 2^2250777581 is an apocalyptic number.

It is an amenable number.

2250777581 is a deficient number, since it is larger than the sum of its proper divisors (173136751).

2250777581 is a wasteful number, since it uses less digits than its factorization.

2250777581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173136750.

The product of its (nonzero) digits is 274400, while the sum is 44.

The square root of 2250777581 is about 47442.3606179119. The cubic root of 2250777581 is about 1310.5216307345.

The spelling of 2250777581 in words is "two billion, two hundred fifty million, seven hundred seventy-seven thousand, five hundred eighty-one".