2061422261 has 6 divisors (see below), whose sum is σ = 2189815650. Its totient is φ = 1940161856.

The previous prime is 2061422257. The next prime is 2061422263. The reversal of 2061422261 is 1622241602.

It can be written as a sum of positive squares in 3 ways, for example, as 178730161 + 1882692100 = 13369^2 + 43390^2 .

It is not a de Polignac number, because 2061422261 - 2² = 2061422257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2061422261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061422263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3566186 + ... + 3566763.

It is an arithmetic number, because the mean of its divisors is an integer number (364969275).

Almost surely, 2^2061422261 is an apocalyptic number.

It is an amenable number.

2061422261 is a deficient number, since it is larger than the sum of its proper divisors (128393389).

2061422261 is an equidigital number, since it uses as much as digits as its factorization.

2061422261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132983 (or 7132966 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2061422261 is about 45402.8882451326. Note that the first 3 decimals coincide. The cubic root of 2061422261 is about 1272.6890881233.

Adding to 2061422261 its reverse (1622241602), we get a palindrome (3683663863).

It can be divided in two parts, 20614 and 22261, that added together give a cube (42875 = 35³).

The spelling of 2061422261 in words is "two billion, sixty-one million, four hundred twenty-two thousand, two hundred sixty-one".