2259724781 has 4 divisors (see below), whose sum is σ = 2259974652. Its totient is φ = 2259474912.

The previous prime is 2259724763. The next prime is 2259724793. The reversal of 2259724781 is 1874279522.

2259724781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 611770756 + 1647954025 = 24734^2 + 40595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2259724781 is a prime.

It is a super-2 number, since 2×2259724781² = 10212712171730995922, 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 (2259724741) 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, 110840 + ... + 129633.

It is an arithmetic number, because the mean of its divisors is an integer number (564993663).

Almost surely, 2^2259724781 is an apocalyptic number.

It is an amenable number.

2259724781 is a deficient number, since it is larger than the sum of its proper divisors (249871).

2259724781 is an equidigital number, since it uses as much as digits as its factorization.

2259724781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249870.

The product of its digits is 564480, while the sum is 47.

The square root of 2259724781 is about 47536.5625702995. The cubic root of 2259724781 is about 1312.2558456928.

The spelling of 2259724781 in words is "two billion, two hundred fifty-nine million, seven hundred twenty-four thousand, seven hundred eighty-one".