31103023 has 4 divisors (see below), whose sum is σ = 35546320. Its totient is φ = 26659728.

The previous prime is 31103021. The next prime is 31103029. The reversal of 31103023 is 32030113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32030113 = 787 ⋅40699.

It is a cyclic number.

It is not a de Polignac number, because 31103023 - 2¹ = 31103021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31102994 and 31103012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103021) 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, 2221638 + ... + 2221651.

It is an arithmetic number, because the mean of its divisors is an integer number (8886580).

Almost surely, 2^31103023 is an apocalyptic number.

31103023 is a deficient number, since it is larger than the sum of its proper divisors (4443297).

31103023 is an equidigital number, since it uses as much as digits as its factorization.

31103023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443296.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 31103023 is about 5577.0084274636. The cubic root of 31103023 is about 314.4856744924.

Adding to 31103023 its reverse (32030113), we get a palindrome (63133136).

The spelling of 31103023 in words is "thirty-one million, one hundred three thousand, twenty-three".