1000023031 has 4 divisors (see below), whose sum is σ = 1142883472. Its totient is φ = 857162592.

The previous prime is 1000022971. The next prime is 1000023041. The reversal of 1000023031 is 1303200001.

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 1000023031 - 2²¹ = 997925879 is a prime.

It is a super-2 number, since 2×1000023031² = 2000092125060853922, 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 = 1000022999 and 1000023017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000023041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71430210 + ... + 71430223.

It is an arithmetic number, because the mean of its divisors is an integer number (285720868).

Almost surely, 2^1000023031 is an apocalyptic number.

1000023031 is a deficient number, since it is larger than the sum of its proper divisors (142860441).

1000023031 is an equidigital number, since it uses as much as digits as its factorization.

1000023031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142860440.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1000023031 is about 31623.1407516711. The cubic root of 1000023031 is about 1000.0076769411.

Adding to 1000023031 its reverse (1303200001), we get a palindrome (2303223032).

The spelling of 1000023031 in words is "one billion, twenty-three thousand, thirty-one".