2021142431 has 8 divisors (see below), whose sum is σ = 2519865984. Its totient is φ = 1574916120.

The previous prime is 2021142349. The next prime is 2021142449. The reversal of 2021142431 is 1342411202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021142431 is a prime.

It is a super-2 number, since 2×2021142431² = 8170033452777179522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021142031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13124225 + ... + 13124378.

It is an arithmetic number, because the mean of its divisors is an integer number (314983248).

Almost surely, 2^2021142431 is an apocalyptic number.

2021142431 is a deficient number, since it is larger than the sum of its proper divisors (498723553).

2021142431 is a wasteful number, since it uses less digits than its factorization.

2021142431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26248621.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2021142431 is about 44957.1176900833. The cubic root of 2021142431 is about 1264.3451293357.

Adding to 2021142431 its reverse (1342411202), we get a palindrome (3363553633).

The spelling of 2021142431 in words is "two billion, twenty-one million, one hundred forty-two thousand, four hundred thirty-one".