2051956961 has 4 divisors (see below), whose sum is σ = 2052874032. Its totient is φ = 2051039892.

The previous prime is 2051956931. The next prime is 2051957009. The reversal of 2051956961 is 1696591502.

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: 1696591502 = 2 ⋅848295751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051956961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051956931) 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, 455171 + ... + 459656.

It is an arithmetic number, because the mean of its divisors is an integer number (513218508).

Almost surely, 2^2051956961 is an apocalyptic number.

It is an amenable number.

2051956961 is a deficient number, since it is larger than the sum of its proper divisors (917071).

2051956961 is an equidigital number, since it uses as much as digits as its factorization.

2051956961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917070.

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 2051956961 is about 45298.5315545659. The cubic root of 2051956961 is about 1270.7381909253.

The spelling of 2051956961 in words is "two billion, fifty-one million, nine hundred fifty-six thousand, nine hundred sixty-one".