2051405430 has 96 divisors (see below), whose sum is σ = 5105721600. Its totient is φ = 527472000.

The previous prime is 2051405399. The next prime is 2051405441. The reversal of 2051405430 is 345041502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051405430.

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 47 ways as a sum of consecutive naturals, for example, 8172805 + ... + 8173055.

It is an arithmetic number, because the mean of its divisors is an integer number (53184600).

Almost surely, 2^2051405430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051405430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2552860800).

2051405430 is an abundant number, since it is smaller than the sum of its proper divisors (3054316170).

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

2051405430 is a wasteful number, since it uses less digits than its factorization.

2051405430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2051405430 is about 45292.4434094695. The cubic root of 2051405430 is about 1270.6243298129.

Adding to 2051405430 its reverse (345041502), we get a palindrome (2396446932).

The spelling of 2051405430 in words is "two billion, fifty-one million, four hundred five thousand, four hundred thirty".