1021343431 has 4 divisors (see below), whose sum is σ = 1056562200. Its totient is φ = 986124664.

The previous prime is 1021343413. The next prime is 1021343447. The reversal of 1021343431 is 1343431201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021343431 - 2⁵ = 1021343399 is a prime.

It is a super-2 number, since 2×1021343431² = 2086284808093703522, 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 (1021343131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17609341 + ... + 17609398.

It is an arithmetic number, because the mean of its divisors is an integer number (264140550).

Almost surely, 2^1021343431 is an apocalyptic number.

1021343431 is a deficient number, since it is larger than the sum of its proper divisors (35218769).

1021343431 is an equidigital number, since it uses as much as digits as its factorization.

1021343431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35218768.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1021343431 is about 31958.4641527092. The cubic root of 1021343431 is about 1007.0644529833.

Adding to 1021343431 its reverse (1343431201), we get a palindrome (2364774632).

The spelling of 1021343431 in words is "one billion, twenty-one million, three hundred forty-three thousand, four hundred thirty-one".