2051093521 has 3 divisors (see below), whose sum is σ = 2051138811. Its totient is φ = 2051048232.

The previous prime is 2051093519. The next prime is 2051093531. The reversal of 2051093521 is 1253901502.

The square root of 2051093521 is 45289.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1700655121 + 350438400 = 41239^2 + 18720^2 .

It is not a de Polignac number, because 2051093521 - 2¹ = 2051093519 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051093521.

It is not an unprimeable number, because it can be changed into a prime (2051093531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22645 + ... + 67933.

It is an arithmetic number, because the mean of its divisors is an integer number (683712937).

Almost surely, 2^2051093521 is an apocalyptic number.

2051093521 is the 45289-th square number.

2051093521 is the 22645-th centered octagonal number.

It is an amenable number.

2051093521 is a deficient number, since it is larger than the sum of its proper divisors (45290).

2051093521 is an frugal number, since it uses more digits than its factorization.

2051093521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90578 (or 45289 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The cubic root of 2051093521 is about 1270.5599285579.

The spelling of 2051093521 in words is "two billion, fifty-one million, ninety-three thousand, five hundred twenty-one".