2522781861 has 24 divisors (see below), whose sum is σ = 3585769824. Its totient is φ = 1577360640.

The previous prime is 2522781853. The next prime is 2522781871. The reversal of 2522781861 is 1681872252.

2522781861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2522781861 - 2³ = 2522781853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522781851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249066 + ... + 258996.

It is an arithmetic number, because the mean of its divisors is an integer number (149407076).

Almost surely, 2^2522781861 is an apocalyptic number.

It is an amenable number.

2522781861 is a deficient number, since it is larger than the sum of its proper divisors (1062987963).

2522781861 is a wasteful number, since it uses less digits than its factorization.

2522781861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261 (or 10244 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 2522781861 is about 50227.3019482432. The cubic root of 2522781861 is about 1361.3189808043.

The spelling of 2522781861 in words is "two billion, five hundred twenty-two million, seven hundred eighty-one thousand, eight hundred sixty-one".