1001311143 has 64 divisors (see below), whose sum is σ = 1611187200. Its totient is φ = 541347840.

The previous prime is 1001311133. The next prime is 1001311147. The reversal of 1001311143 is 3411131001.

It is not a de Polignac number, because 1001311143 - 2⁵ = 1001311111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001311147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5593828 + ... + 5594006.

It is an arithmetic number, because the mean of its divisors is an integer number (25174800).

Almost surely, 2^1001311143 is an apocalyptic number.

1001311143 is a deficient number, since it is larger than the sum of its proper divisors (609876057).

1001311143 is a wasteful number, since it uses less digits than its factorization.

1001311143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1001311143 is about 31643.5008019024. The cubic root of 1001311143 is about 1000.4368567950.

Adding to 1001311143 its reverse (3411131001), we get a palindrome (4412442144).

The spelling of 1001311143 in words is "one billion, one million, three hundred eleven thousand, one hundred forty-three".