2051065499 has 4 divisors (see below), whose sum is σ = 2344074864. Its totient is φ = 1758056136.

The previous prime is 2051065483. The next prime is 2051065501. The reversal of 2051065499 is 9945601502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2051065499 - 2⁴ = 2051065483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051065399) 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, 146504672 + ... + 146504685.

It is an arithmetic number, because the mean of its divisors is an integer number (586018716).

Almost surely, 2^2051065499 is an apocalyptic number.

2051065499 is a deficient number, since it is larger than the sum of its proper divisors (293009365).

2051065499 is an equidigital number, since it uses as much as digits as its factorization.

2051065499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293009364.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 2051065499 is about 45288.6906302225. The cubic root of 2051065499 is about 1270.5541424099.

The spelling of 2051065499 in words is "two billion, fifty-one million, sixty-five thousand, four hundred ninety-nine".