2051671993 has 16 divisors (see below), whose sum is σ = 2397404800. Its totient is φ = 1755060048.

The previous prime is 2051671931. The next prime is 2051671997. The reversal of 2051671993 is 3991761502.

It is not a de Polignac number, because 2051671993 - 2¹⁷ = 2051540921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2051671997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173671 + ... + 185107.

It is an arithmetic number, because the mean of its divisors is an integer number (149837800).

Almost surely, 2^2051671993 is an apocalyptic number.

It is an amenable number.

2051671993 is a deficient number, since it is larger than the sum of its proper divisors (345732807).

2051671993 is an equidigital number, since it uses as much as digits as its factorization.

2051671993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11981 (or 11967 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 2051671993 is about 45295.3860012253. The cubic root of 2051671993 is about 1270.6793631019.

The spelling of 2051671993 in words is "two billion, fifty-one million, six hundred seventy-one thousand, nine hundred ninety-three".