2285038781 has 4 divisors (see below), whose sum is σ = 2405304000. Its totient is φ = 2164773564.

The previous prime is 2285038771. The next prime is 2285038787. The reversal of 2285038781 is 1878305822.

2285038781 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1878305822 = 2 ⋅939152911.

It is a cyclic number.

It is not a de Polignac number, because 2285038781 - 2²² = 2280844477 is a prime.

It is a super-2 number, since 2×2285038781² = 10442804461347931922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2285038787) 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, 60132581 + ... + 60132618.

It is an arithmetic number, because the mean of its divisors is an integer number (601326000).

Almost surely, 2^2285038781 is an apocalyptic number.

It is an amenable number.

2285038781 is a deficient number, since it is larger than the sum of its proper divisors (120265219).

2285038781 is a wasteful number, since it uses less digits than its factorization.

2285038781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120265218.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 2285038781 is about 47802.0792539404. The cubic root of 2285038781 is about 1317.1377337542.

The spelling of 2285038781 in words is "two billion, two hundred eighty-five million, thirty-eight thousand, seven hundred eighty-one".