2006054521 has 3 divisors (see below), whose sum is σ = 2006099311. Its totient is φ = 2006009732.

The previous prime is 2006054507. The next prime is 2006054563. The reversal of 2006054521 is 1254506002.

The square root of 2006054521 is 44789.

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., 120758121 + 1885296400 = 10989^2 + 43420^2 .

It is not a de Polignac number, because 2006054521 - 2⁵ = 2006054489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2006054591) 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, 22395 + ... + 67183.

Almost surely, 2^2006054521 is an apocalyptic number.

2006054521 is the 44789-th square number.

2006054521 is the 22395-th centered octagonal number.

It is an amenable number.

2006054521 is a deficient number, since it is larger than the sum of its proper divisors (44790).

2006054521 is an frugal number, since it uses more digits than its factorization.

2006054521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89578 (or 44789 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The cubic root of 2006054521 is about 1261.1911388682.

Multiplying 2006054521 by its sum of digits (25), we get a square (50151363025 = 223945²).

The spelling of 2006054521 in words is "two billion, six million, fifty-four thousand, five hundred twenty-one".