2011530421 has 8 divisors (see below), whose sum is σ = 2019394520. Its totient is φ = 2003678208.

The previous prime is 2011530413. The next prime is 2011530427. The reversal of 2011530421 is 1240351102.

It can be written as a sum of positive squares in 4 ways, for example, as 137592900 + 1873937521 = 11730^2 + 43289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011530421 - 2³ = 2011530413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011530427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479485 + ... + 483661.

It is an arithmetic number, because the mean of its divisors is an integer number (252424315).

Almost surely, 2^2011530421 is an apocalyptic number.

It is an amenable number.

2011530421 is a deficient number, since it is larger than the sum of its proper divisors (7864099).

2011530421 is a wasteful number, since it uses less digits than its factorization.

2011530421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2011530421 is about 44850.0883053757. The cubic root of 2011530421 is about 1262.3376484498.

Adding to 2011530421 its reverse (1240351102), we get a palindrome (3251881523).

The spelling of 2011530421 in words is "two billion, eleven million, five hundred thirty thousand, four hundred twenty-one".