1001023431 has 16 divisors (see below), whose sum is σ = 1342072800. Its totient is φ = 663671808.

The previous prime is 1001023367. The next prime is 1001023433. The reversal of 1001023431 is 1343201001.

It is not a de Polignac number, because 1001023431 - 2⁶ = 1001023367 is a prime.

It is a super-2 number, since 2×1001023431² = 2004095818822023522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1001023431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001023433) 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 15 ways as a sum of consecutive naturals, for example, 671535 + ... + 673023.

It is an arithmetic number, because the mean of its divisors is an integer number (83879550).

Almost surely, 2^1001023431 is an apocalyptic number.

1001023431 is a deficient number, since it is larger than the sum of its proper divisors (341049369).

1001023431 is a wasteful number, since it uses less digits than its factorization.

1001023431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1001023431 is about 31638.9543284856. The cubic root of 1001023431 is about 1000.3410273538.

Adding to 1001023431 its reverse (1343201001), we get a palindrome (2344224432).

The spelling of 1001023431 in words is "one billion, one million, twenty-three thousand, four hundred thirty-one".