2051030142 has 144 divisors (see below), whose sum is σ = 5293372032. Its totient is φ = 572171040.

The previous prime is 2051030123. The next prime is 2051030143. The reversal of 2051030142 is 2410301502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051030143) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9720417 + ... + 9720627.

It is an arithmetic number, because the mean of its divisors is an integer number (36759528).

Almost surely, 2^2051030142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051030142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2646686016).

2051030142 is an abundant number, since it is smaller than the sum of its proper divisors (3242341890).

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

2051030142 is a wasteful number, since it uses less digits than its factorization.

2051030142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2051030142 is about 45288.3002772239. The cubic root of 2051030142 is about 1270.5468416125.

Adding to 2051030142 its reverse (2410301502), we get a palindrome (4461331644).

The spelling of 2051030142 in words is "two billion, fifty-one million, thirty thousand, one hundred forty-two".