2005551030 has 128 divisors (see below), whose sum is σ = 5845312512. Its totient is φ = 429907968.

The previous prime is 2005551029. The next prime is 2005551043. The reversal of 2005551030 is 301555002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2005550988 and 2005551006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1202257 + ... + 1203923.

It is an arithmetic number, because the mean of its divisors is an integer number (45666504).

Almost surely, 2^2005551030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2005551030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2922656256).

2005551030 is an abundant number, since it is smaller than the sum of its proper divisors (3839761482).

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

2005551030 is a wasteful number, since it uses less digits than its factorization.

2005551030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 2005551030 is about 44783.3789479981. The cubic root of 2005551030 is about 1261.0856163922.

The spelling of 2005551030 in words is "two billion, five million, five hundred fifty-one thousand, thirty".