2051499784 has 16 divisors (see below), whose sum is σ = 3909621420. Its totient is φ = 1008934080.

The previous prime is 2051499781. The next prime is 2051499799. The reversal of 2051499784 is 4879941502.

It can be written as a sum of positive squares in 2 ways, for example, as 1874024100 + 177475684 = 43290^2 + 13322^2 .

It is not an unprimeable number, because it can be changed into a prime (2051499781) 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, 2101459 + ... + 2102434.

Almost surely, 2^2051499784 is an apocalyptic number.

It is an amenable number.

2051499784 is a deficient number, since it is larger than the sum of its proper divisors (1858121636).

2051499784 is a wasteful number, since it uses less digits than its factorization.

2051499784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203960 (or 4203956 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 2051499784 is about 45293.4850061242. The cubic root of 2051499784 is about 1270.6438102218.

The spelling of 2051499784 in words is "two billion, fifty-one million, four hundred ninety-nine thousand, seven hundred eighty-four".