2051520651 has 12 divisors (see below), whose sum is σ = 2978201200. Its totient is φ = 1360806480.

The previous prime is 2051520643. The next prime is 2051520701. The reversal of 2051520651 is 1560251502.

2051520651 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 5 + 2 + 0 + 651 = 666.

It is not a de Polignac number, because 2051520651 - 2³ = 2051520643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051520631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570940 + ... + 574521.

Almost surely, 2^2051520651 is an apocalyptic number.

2051520651 is a deficient number, since it is larger than the sum of its proper divisors (926680549).

2051520651 is a wasteful number, since it uses less digits than its factorization.

2051520651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145666 (or 1145663 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 2051520651 is about 45293.7153587559. The cubic root of 2051520651 is about 1270.6481183601.

The spelling of 2051520651 in words is "two billion, fifty-one million, five hundred twenty thousand, six hundred fifty-one".