1020323431 has 6 divisors (see below), whose sum is σ = 1029959840. Its totient is φ = 1010776356.

The previous prime is 1020323413. The next prime is 1020323453. The reversal of 1020323431 is 1343230201.

It is a de Polignac number, because none of the positive numbers 2^k-1020323431 is a prime.

It is a super-2 number, since 2×1020323431² = 2082119807695223522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020323399 and 1020323408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020323411) 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 5 ways as a sum of consecutive naturals, for example, 33111 + ... + 56008.

Almost surely, 2^1020323431 is an apocalyptic number.

1020323431 is a deficient number, since it is larger than the sum of its proper divisors (9636409).

1020323431 is an frugal number, since it uses more digits than its factorization.

1020323431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89333 (or 89226 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1020323431 is about 31942.5019527275. The cubic root of 1020323431 is about 1006.7290947182.

Adding to 1020323431 its reverse (1343230201), we get a palindrome (2363553632).

The spelling of 1020323431 in words is "one billion, twenty million, three hundred twenty-three thousand, four hundred thirty-one".