2050515521 has 4 divisors (see below), whose sum is σ = 2069327700. Its totient is φ = 2031703344.

The previous prime is 2050515497. The next prime is 2050515539. The reversal of 2050515521 is 1255150502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1867968400 + 182547121 = 43220^2 + 13511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2050515521 - 2²² = 2046321217 is a prime.

It is a super-2 number, since 2×2050515521² = 8409227803723802882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2050515421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9405926 + ... + 9406143.

It is an arithmetic number, because the mean of its divisors is an integer number (517331925).

Almost surely, 2^2050515521 is an apocalyptic number.

It is an amenable number.

2050515521 is a deficient number, since it is larger than the sum of its proper divisors (18812179).

2050515521 is a wasteful number, since it uses less digits than its factorization.

2050515521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18812178.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 2050515521 is about 45282.6183098990. The cubic root of 2050515521 is about 1270.4405690349.

The spelling of 2050515521 in words is "two billion, fifty million, five hundred fifteen thousand, five hundred twenty-one".