23191471 has 4 divisors (see below), whose sum is σ = 23214352. Its totient is φ = 23168592.

The previous prime is 23191463. The next prime is 23191507. The reversal of 23191471 is 17419132.

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 23191471 - 2³ = 23191463 is a prime.

It is a super-3 number, since 3×23191471³ (a number of 23 digits) contains 333 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 (23101471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9846 + ... + 11971.

It is an arithmetic number, because the mean of its divisors is an integer number (5803588).

Almost surely, 2^23191471 is an apocalyptic number.

23191471 is a deficient number, since it is larger than the sum of its proper divisors (22881).

23191471 is a wasteful number, since it uses less digits than its factorization.

23191471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22880.

The product of its digits is 1512, while the sum is 28.

The square root of 23191471 is about 4815.7523815080. The cubic root of 23191471 is about 285.1736747941.

The spelling of 23191471 in words is "twenty-three million, one hundred ninety-one thousand, four hundred seventy-one".