2021531413 has 8 divisors (see below), whose sum is σ = 2208983616. Its totient is φ = 1834692000.

The previous prime is 2021531339. The next prime is 2021531423. The reversal of 2021531413 is 3141351202.

It is a happy number.

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 2021531413 - 2¹⁷ = 2021400341 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 (2021531423) 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, 146281 + ... + 159502.

It is an arithmetic number, because the mean of its divisors is an integer number (276122952).

Almost surely, 2^2021531413 is an apocalyptic number.

It is an amenable number.

2021531413 is a deficient number, since it is larger than the sum of its proper divisors (187452203).

2021531413 is a wasteful number, since it uses less digits than its factorization.

2021531413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306395.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2021531413 is about 44961.4436267342. The cubic root of 2021531413 is about 1264.4262346127.

Adding to 2021531413 its reverse (3141351202), we get a palindrome (5162882615).

The spelling of 2021531413 in words is "two billion, twenty-one million, five hundred thirty-one thousand, four hundred thirteen".