2021431242 has 16 divisors (see below), whose sum is σ = 4255644960. Its totient is φ = 638346672.

The previous prime is 2021431213. The next prime is 2021431259. The reversal of 2021431242 is 2421341202.

It is a super-2 number, since 2×2021431242² = 8172368532267325128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8865813 + ... + 8866040.

It is an arithmetic number, because the mean of its divisors is an integer number (265977810).

Almost surely, 2^2021431242 is an apocalyptic number.

2021431242 is an abundant number, since it is smaller than the sum of its proper divisors (2234213718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021431242 is a wasteful number, since it uses less digits than its factorization.

2021431242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17731877.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2021431242 is about 44960.3296473680. The cubic root of 2021431242 is about 1264.4053493024.

Adding to 2021431242 its reverse (2421341202), we get a palindrome (4442772444).

The spelling of 2021431242 in words is "two billion, twenty-one million, four hundred thirty-one thousand, two hundred forty-two".