2050166551 has 4 divisors (see below), whose sum is σ = 2051439192. Its totient is φ = 2048893912.

The previous prime is 2050166497. The next prime is 2050166593. The reversal of 2050166551 is 1556610502.

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 2050166551 - 2⁹ = 2050166039 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2050163551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633901 + ... + 637126.

It is an arithmetic number, because the mean of its divisors is an integer number (512859798).

Almost surely, 2^2050166551 is an apocalyptic number.

2050166551 is a deficient number, since it is larger than the sum of its proper divisors (1272641).

2050166551 is a wasteful number, since it uses less digits than its factorization.

2050166551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272640.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 2050166551 is about 45278.7649014414. The cubic root of 2050166551 is about 1270.3684943471.

The spelling of 2050166551 in words is "two billion, fifty million, one hundred sixty-six thousand, five hundred fifty-one".