2051663550 has 24 divisors (see below), whose sum is σ = 5088125976. Its totient is φ = 547110240.

The previous prime is 2051663543. The next prime is 2051663557. The reversal of 2051663550 is 553661502.

It is an interprime number because it is at equal distance from previous prime (2051663543) and next prime (2051663557).

It is a super-3 number, since 3×2051663550³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051663557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6838729 + ... + 6839028.

It is an arithmetic number, because the mean of its divisors is an integer number (212005249).

Almost surely, 2^2051663550 is an apocalyptic number.

2051663550 is an abundant number, since it is smaller than the sum of its proper divisors (3036462426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051663550 is a wasteful number, since it uses less digits than its factorization.

2051663550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13677772 (or 13677767 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 2051663550 is about 45295.2928017912. The cubic root of 2051663550 is about 1270.6776200746.

The spelling of 2051663550 in words is "two billion, fifty-one million, six hundred sixty-three thousand, five hundred fifty".