2051204240 has 40 divisors (see below), whose sum is σ = 4771321848. Its totient is φ = 820090880.

The previous prime is 2051204227. The next prime is 2051204273. The reversal of 2051204240 is 424021502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 122589184 + 1928615056 = 11072^2 + 43916^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210680 + ... + 220200.

Almost surely, 2^2051204240 is an apocalyptic number.

2051204240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051204240 is an abundant number, since it is smaller than the sum of its proper divisors (2720117608).

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

2051204240 is a wasteful number, since it uses less digits than its factorization.

2051204240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12227 (or 12221 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2051204240 is about 45290.2223443427. Note that the first 3 decimals coincide. The cubic root of 2051204240 is about 1270.5827899555.

Adding to 2051204240 its reverse (424021502), we get a palindrome (2475225742).

The spelling of 2051204240 in words is "two billion, fifty-one million, two hundred four thousand, two hundred forty".