2051521422 has 16 divisors (see below), whose sum is σ = 4244527440. Its totient is φ = 660259712.

The previous prime is 2051521421. The next prime is 2051521463. The reversal of 2051521422 is 2241251502.

It is a junction number, because it is equal to n+sod(n) for n = 2051521392 and 2051521401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051521421) 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 7 ways as a sum of consecutive naturals, for example, 5895003 + ... + 5895350.

It is an arithmetic number, because the mean of its divisors is an integer number (265282965).

Almost surely, 2^2051521422 is an apocalyptic number.

2051521422 is an abundant number, since it is smaller than the sum of its proper divisors (2193006018).

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

2051521422 is a wasteful number, since it uses less digits than its factorization.

2051521422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790387.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2051521422 is about 45293.7238698697. The cubic root of 2051521422 is about 1270.6482775379.

Adding to 2051521422 its reverse (2241251502), we get a palindrome (4292772924).

The spelling of 2051521422 in words is "two billion, fifty-one million, five hundred twenty-one thousand, four hundred twenty-two".