23001031 has 4 divisors (see below), whose sum is σ = 23794200. Its totient is φ = 22207864.

The previous prime is 23001019. The next prime is 23001049. The reversal of 23001031 is 13010032.

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 23001031 - 2⁷ = 23000903 is a prime.

It is a super-2 number, since 2×23001031² = 1058094854125922, 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 = 23000999 and 23001017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23001631) 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, 396541 + ... + 396598.

It is an arithmetic number, because the mean of its divisors is an integer number (5948550).

Almost surely, 2^23001031 is an apocalyptic number.

23001031 is a deficient number, since it is larger than the sum of its proper divisors (793169).

23001031 is an equidigital number, since it uses as much as digits as its factorization.

23001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793168.

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

The square root of 23001031 is about 4795.9390112886. The cubic root of 23001031 is about 284.3909472359.

Adding to 23001031 its reverse (13010032), we get a palindrome (36011063).

Subtracting from 23001031 its reverse (13010032), we obtain a palindrome (9990999).

The spelling of 23001031 in words is "twenty-three million, one thousand, thirty-one".