23197831 has 4 divisors (see below), whose sum is σ = 23208064. Its totient is φ = 23187600.

The previous prime is 23197829. The next prime is 23197847. The reversal of 23197831 is 13879132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23197831 - 2¹ = 23197829 is a prime.

It is a super-2 number, since 2×23197831² = 1076278726209122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23197891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (5802016).

Almost surely, 2^23197831 is an apocalyptic number.

23197831 is a deficient number, since it is larger than the sum of its proper divisors (10233).

23197831 is an equidigital number, since it uses as much as digits as its factorization.

23197831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232.

The product of its digits is 9072, while the sum is 34.

The square root of 23197831 is about 4816.4126691969. The cubic root of 23197831 is about 285.1997409688.

The spelling of 23197831 in words is "twenty-three million, one hundred ninety-seven thousand, eight hundred thirty-one".