2051335261 has 2 divisors, whose sum is σ = 2051335262. Its totient is φ = 2051335260.

The previous prime is 2051335207. The next prime is 2051335303. The reversal of 2051335261 is 1625331502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1504664100 + 546671161 = 38790^2 + 23381^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051335261 - 2¹⁵ = 2051302493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051335861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025667630 + 1025667631.

It is an arithmetic number, because the mean of its divisors is an integer number (1025667631).

Almost surely, 2^2051335261 is an apocalyptic number.

It is an amenable number.

2051335261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051335261 is an equidigital number, since it uses as much as digits as its factorization.

2051335261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2051335261 is about 45291.6687813554. The cubic root of 2051335261 is about 1270.6098422728.

Adding to 2051335261 its reverse (1625331502), we get a palindrome (3676666763).

The spelling of 2051335261 in words is "two billion, fifty-one million, three hundred thirty-five thousand, two hundred sixty-one".