2051717998 has 32 divisors (see below), whose sum is σ = 3603592800. Its totient is φ = 865704960.

The previous prime is 2051717977. The next prime is 2051718029. The reversal of 2051717998 is 8997171502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10273 + ... + 64876.

It is an arithmetic number, because the mean of its divisors is an integer number (112612275).

Almost surely, 2^2051717998 is an apocalyptic number.

2051717998 is a deficient number, since it is larger than the sum of its proper divisors (1551874802).

2051717998 is a wasteful number, since it uses less digits than its factorization.

2051717998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75252.

The product of its (nonzero) digits is 317520, while the sum is 49.

The square root of 2051717998 is about 45295.8938315605. The cubic root of 2051717998 is about 1270.6888605861.

The spelling of 2051717998 in words is "two billion, fifty-one million, seven hundred seventeen thousand, nine hundred ninety-eight".