2053147861 has 2 divisors, whose sum is σ = 2053147862. Its totient is φ = 2053147860.

The previous prime is 2053147801. The next prime is 2053147883. The reversal of 2053147861 is 1687413502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1915812900 + 137334961 = 43770^2 + 11719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2053147861 is a prime.

It is a super-2 number, since 2×2053147861² = 8430832278257750642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2053147861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2053147801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026573930 + 1026573931.

It is an arithmetic number, because the mean of its divisors is an integer number (1026573931).

Almost surely, 2^2053147861 is an apocalyptic number.

It is an amenable number.

2053147861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053147861 is an equidigital number, since it uses as much as digits as its factorization.

2053147861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 2053147861 is about 45311.6746655870. The cubic root of 2053147861 is about 1270.9839773414.

The spelling of 2053147861 in words is "two billion, fifty-three million, one hundred forty-seven thousand, eight hundred sixty-one".