1001143231 has 24 divisors (see below), whose sum is σ = 1162143360. Its totient is φ = 859407120.

The previous prime is 1001143223. The next prime is 1001143259. The reversal of 1001143231 is 1323411001.

It is not a de Polignac number, because 1001143231 - 2³ = 1001143223 is a prime.

It is a super-2 number, since 2×1001143231² = 2004575537954238722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001143291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1017966 + ... + 1018948.

It is an arithmetic number, because the mean of its divisors is an integer number (48422640).

Almost surely, 2^1001143231 is an apocalyptic number.

1001143231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001143231 is a deficient number, since it is larger than the sum of its proper divisors (161000129).

1001143231 is a wasteful number, since it uses less digits than its factorization.

1001143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1001143231 is about 31640.8475076127. The cubic root of 1001143231 is about 1000.3809318725.

Adding to 1001143231 its reverse (1323411001), we get a palindrome (2324554232).

The spelling of 1001143231 in words is "one billion, one million, one hundred forty-three thousand, two hundred thirty-one".