2051342649 has 12 divisors (see below), whose sum is σ = 3031959216. Its totient is φ = 1335757752.

The previous prime is 2051342639. The next prime is 2051342717. The reversal of 2051342649 is 9462431502.

It is a happy number.

2051342649 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 3 + 4 + 2 + 649 = 666.

It is not a de Polignac number, because 2051342649 - 2¹⁵ = 2051309881 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2051342639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2649927 + ... + 2650700.

It is an arithmetic number, because the mean of its divisors is an integer number (252663268).

Almost surely, 2^2051342649 is an apocalyptic number.

It is an amenable number.

2051342649 is a deficient number, since it is larger than the sum of its proper divisors (980616567).

2051342649 is a wasteful number, since it uses less digits than its factorization.

2051342649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300676 (or 5300673 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2051342649 is about 45291.7503415357. The cubic root of 2051342649 is about 1270.6113676620.

The spelling of 2051342649 in words is "two billion, fifty-one million, three hundred forty-two thousand, six hundred forty-nine".